v0.3.0

• JavaScript (.js/.jsx) support: require() → import (not call), module.exports ignored
• Packaging hardening: CI smoke-test, migration presence test, Python 3.12+3.13 matrix
• Performance: batch embedding (single model, chunked by 256, rich Progress bar)
• Benchmarks: --profile flag, scripts/benchmark_index.py, query-efficiency regression test
• Migration 0005: composite index symbols(name, file_id) for faster resolve
• Fixed N+1 in resolve_call_edges (batch SELECT vs per-edge loop)
• Adoption tooling: memos doctor, memos watch, usage_stats_tool
• Diagnostics: memos doctor checks index freshness, schema, embeddings, unresolved edges
• MCP: _tracked decorator counts per-session tool usage via usage_stats_tool
• File watching: memos watch auto-reindexes on file changes (watchdog, 500ms debounce)