chore: skill pipeline updates

[skills-generation]

Auto-generated by the monitor-skills workflow.

This PR bundles all changes produced by the skill generation pipeline:

• skill_coverage.json — page coverage state
• skill_candidates.json — triage backlog
• ref_repo_change_alerts.json — upstream reference repo alerts
• repo_state.json — tracked reference repo commit SHAs
• agent_skills_config.json — generated skills consumed by the mkdocs plugin

The branch accumulates changes across triage and generate batches;
this single PR gets updated instead of creating new ones.

Merging publishes the skills to the docs site.

[skills-generation]

🤖 Skill pipeline status

Setting	Value
Mode	generate-batch
Iteration	4 / 20
Outcome (this iteration)	success
Phases run	generate-skills:success
Latest run	#75

This comment is updated each iteration. Failure mid-chain leaves the chain stopped — re-trigger manually with mode: generate-batch if recovery is needed.

[eshaben]

just did a quick spot check and noticed one thing

[0xlukem]

LGTM