Add CPS ML datafeed troubleshooting docs for serverless

[valeriy42]

• Add a Machine Learning CPS troubleshooting hub under troubleshoot/elasticsearch/ with eleven topic pages for cross-project anomaly detection datafeeds (linked project skips, scope changes, routing, cloud token mint/runtime, field mapping, schema drift, scope, migration, and clone routing).
• Register the hub and child pages in troubleshoot/toc.yml and link from cross-project search, project routing, and ML run-jobs topics.
• Pages use serverless preview applies_to, Diagnose/Resolve structure, and verbatim searchable error message examples; no internal engineering references.

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🔍 Preview links for changed docs

• explore-analyze/cross-project-search.md
• explore-analyze/cross-project-search/cross-project-search-project-routing.md
• explore-analyze/machine-learning/anomaly-detection/ml-ad-run-jobs.md
• troubleshoot/elasticsearch/machine-learning.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-bulk-migration-partial.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-cloud-token-mint-failure.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-cloud-token-runtime-failure.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-field-mapping-mismatch.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-linked-project-skipped.md

More links …

• troubleshoot/elasticsearch/machine-learning/cps-datafeed-routing-no-match.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-schema-drift.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-scope-too-broad.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-search-scope-changed.md
• troubleshoot/elasticsearch/machine-learning/cps-datafeed-stale-project-reference.md

[github-actions]

Elastic Docs Style Checker (Vale)

Summary: 1 warning, 29 suggestions found

⚠️ Warnings (1): Fix when the suggestion improves clarity or correctness.

File	Line	Rule	Message
troubleshoot/elasticsearch/machine-learning/cps-datafeed-stale-project-reference.md	38	Elastic.Spelling	'misrouted' is a possible misspelling.

💡 Suggestions (29): Optional style improvements. Apply when helpful.

File	Line	Rule	Message
troubleshoot/elasticsearch/machine-learning.md	41	Elastic.Clone	Use Clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	2	Elastic.Clone	Use Clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	12	Elastic.Clone	Use Clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	14	Elastic.Clone	Use Cloning only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	14	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	20	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	24	Elastic.Clone	Use cloned only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	26	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	30	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	36	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	36	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	38	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	46	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	46	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-clone-project-routing.md	56	Elastic.Clone	Use clone only when referring to cloning a GitHub repository or creating a copy that is linked to the original. Often confused with 'copy' and 'duplicate'.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-cloud-token-mint-failure.md	40	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-cloud-token-runtime-failure.md	14	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-cloud-token-runtime-failure.md	83	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-field-mapping-mismatch.md	26	Elastic.Semicolons	Use semicolons judiciously.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-field-mapping-mismatch.md	26	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-field-mapping-mismatch.md	55	Elastic.Semicolons	Use semicolons judiciously.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-routing-no-match.md	14	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-routing-no-match.md	40	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-scope-too-broad.md	43	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-search-scope-changed.md	30	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-search-scope-changed.md	75	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-stale-project-reference.md	14	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-stale-project-reference.md	62	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
troubleshoot/elasticsearch/machine-learning/cps-datafeed-stale-project-reference.md	62	Elastic.Semicolons	Use semicolons judiciously.

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