Clarify numeric session number guidance

Resolve numeric WWDC session numbers

Optimize docs search filtering

Wire Sosumi WWDC RAG defaults

Fix rag-search to use sosumi.db instead of default.db

Update to smith-docc-extractor and upgrade to macOS 15

feat: Handle rich DocC content types in renderer + migrate tests to swift-testing

feat: standardize RAG search commands using SmithRAGCommands

refactor: Remove skill registration

Update DATABASE_SETUP.md with current paths

feat: Add embed-missing command to complete RAG integration

Add RAG search and ingestion commands for semantic WWDC search

Add smith-rag dependency and SosumiRAGAdapter for semantic search

Fix sosumi skill metadata to follow official Claude Code format

docs(v1.3.0): Document compact-agent mode and json-compact format