Add Grafana MCP configuration and corresponding test case

[ArnabChatterjee20k]

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[greptile-apps]

Greptile Summary

Adds an example Grafana MCP configuration and debug logging for rendered MCP settings with environment and header values redacted.

• Documents Grafana and Cloudflare Access configuration.
• Adds MCP serialization and redaction tests.
• Propagates the global debug-logging setting into Claude runner construction.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
claudear.example.toml	Documents a Grafana MCP server, optional tools, authentication, and Cloudflare Access headers.
crates/claudear-integrations/src/runner/claude.rs	Adds redacted MCP debug output and tests for redaction and Grafana configuration serialization.
src/lib.rs	Propagates the application debug-logging flag through the shared provider-runner builder.
src/main.rs	Propagates debug logging when constructing the Claude runner for retry processing.

_{Reviews (4): Last reviewed commit: "Add debug logging support for MCP config..." | Re-trigger Greptile}