feat(04-03): add semantic entity generation to analyze-codebase
- Add Step 9 for semantic entity file generation
- Task tool batching for 100+ file codebases (10 files per batch)
- 50 file limit per run to manage context
- File selection criteria: 3+ exports, 5+ dependents, key directories
- Entity slug convention: path--segments--filename-ext.md
- Entity template with Purpose, Exports, Dependencies, Used By sections
- Update objective, output, and success criteria for entities
- Add context section explaining execution model
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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