Require vector store configuration

[zhangzhenghao]

Summary

• require database.vector_store in config validation
• add default SQLite vector store and sample config entry
• always initialize the master vector store and collaborative filtering collection

Tests

• PATH=/home/openclaw/.local/go1.26/bin:/home/openclaw/go1.26/bin:/home/openclaw/.local/bin:/home/openclaw/go1.26/bin:/home/openclaw/.local/bin:/home/openclaw/.hermes/hermes-agent/venv/bin:/home/openclaw/.hermes/hermes-agent/node_modules/.bin:/usr/bin:/home/openclaw/.local/bin:/home/openclaw/go/bin:/home/openclaw/.npm-global/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/sbin:/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/snap/bin:/home/openclaw/go/bin:/home/openclaw/go/bin GOMODCACHE=/home/openclaw/.cache/gomod go test ./config ./master ./server ./worker -count=1

[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.66%. Comparing base (83a2266) to head (85ace68).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
master/master.go	60.00%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1305      +/-   ##
==========================================
- Coverage   73.67%   73.66%   -0.01%     
==========================================
  Files          93       93              
  Lines       17316    17745     +429     
==========================================
+ Hits        12757    13072     +315     
- Misses       3214     3288      +74     
- Partials     1345     1385      +40     

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