fix: widen skill writer evidence scope

[ScriptedAlchemy]

Summary

• default skill-writing CLI evidence collection to all providers instead of overriding the runner with cursor-only search
• add skill-writing storage_scope/hermes_home support through runner, CLI, and dashboard API so it can read Hermes-profile LCM like session-reflection
• reuse the LCM store resolver across automation tasks and add regressions for all-provider defaults and Hermes-profile skill-writer evidence
• tighten session-reflector prompt guidance so backend facts emit numeric trust values

Verification

• cargo fmt --all --check
• CARGO_TARGET_DIR=/tmp/tracedecay-target/automation-evidence cargo test --test automation_skill_writer_runner_test -- --nocapture
• CARGO_TARGET_DIR=/tmp/tracedecay-target/automation-evidence cargo test --bin tracedecay automation_run_skill_writing -- --nocapture
• CARGO_TARGET_DIR=/tmp/tracedecay-target/automation-evidence cargo test --test automation_session_reflector_runner_test session_reflector_runner_reads_hermes_profile_lcm_with_filters -- --nocapture
• CARGO_TARGET_DIR=/tmp/tracedecay-target/automation-evidence cargo test --test automation_session_reflector_runner_test session_reflector_runner_validates_fact_proposals_without_applying -- --nocapture
• CARGO_TARGET_DIR=/tmp/tracedecay-target/automation-evidence cargo test --lib session_reflector_prompt_requires_numeric_trust -- --nocapture
• CARGO_TARGET_DIR=/tmp/tracedecay-target/automation-evidence cargo run --quiet -- automation run skill-writing --dry-run true

Runtime evidence

• Before: provider=cursor default returned zero hits for the default skill-writing query.
• After: source CLI help shows provider default all; dry-run skill_writer_1782925717_0_ff8c35e1947f03c2 succeeded instead of no_skill_writer_evidence.

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Latest commit: 77475b7

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