chore: v0.6.2 release

[hang-in]

Summary

v0.6.1 이후 검색 품질 개선 + 내부 리팩토링 release.

• Cargo.toml 0.6.1 → 0.6.2 + CHANGELOG v0.6.2

Includes

• feat(search): P89 — vector snippet enrich + 관찰 세션 랭킹 강등 (#100) #101 (P89, Closes 검색 품질 개선: vector 결과 snippet 공백 및 observer 노이즈 완화 #100) — vector snippet enrich + 관찰 세션 랭킹 강등
• refactor(ingest): P90 — WIKI_INVOCATION_MARKER 소유권 ingest 로 이전 #102 (P90) — WIKI_INVOCATION_MARKER 소유권 ingest 이전 (역참조 해소)

Post-merge

1. git tag v0.6.2 + push
2. gh release create v0.6.2

🤖 Generated with Claude Code

[gemini-code-assist]

Code Review

This pull request updates the workspace and package versions from 0.6.1 to 0.6.2 in Cargo.toml and Cargo.lock, and documents the changes in CHANGELOG.md. The documented updates include vector search snippet improvements, ranking demotions for short observation/summary sessions, and internal ownership refactoring of WIKI_INVOCATION_MARKER. There are no review comments, and I have no feedback to provide.