reduce false positives: wider context, numbered diff lines, YAML support

[radetsky]

• Increase default context from 3 to 10 lines (git -U flag + config)
• Add --context N CLI flag and GitHub Action input to override per run
• Number all diff lines sent to LLM (context before/after, removed lines) to eliminate hallucinated file:line references
• Show context_after in LLM-formatted diff (was parsed but never sent)
• Add .yml/.yaml to reviewed file types (GitHub Actions, docker-compose, k8s)
• Increase default max_tokens_per_request from 4096 to 8192
• Strengthen prompt: tell LLM how many context lines are included and instruct it not to flag constructs outside the visible area
• Validate action input 'context' as integer in shell to prevent injection

Co-Authored-By: Claude Sonnet 4.6 noreply@anthropic.com

[github-actions]

✅ LLM Code Review

Status: Passed

Category	Count
Critical Issues	0
Warnings	0
Suggestions	0

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