Multiple fixes for WeKnora Lite mode (SQLite, no Redis):
1. Redis nil pointer panic on FAQ import (knowledge.go)
- Add in-memory fallback (sync.Map) for FAQ import progress tracking
- Add nil guards for running task locks and progress queries
2. seq_id not auto-incrementing in SQLite (chunk.go, tag.go)
- GORM autoIncrement on non-PK columns doesn't work in SQLite
- Add AssignChunkSeqIDs() to pre-assign seq_ids before batch insert
- Add BeforeCreate hook for KnowledgeTag
- Use Unscoped() to include soft-deleted records in MAX(seq_id) query
3. NOW() function not available in SQLite (chunk.go)
- Replace raw SQL NOW() with time.Now() or datetime('now')
- Use dialector check for raw SQL that must differ between PG and SQLite
4. FAQ KB should reject file uploads (knowledge.go)
- Add kb.Type == "faq" check in CreateKnowledgeFromFile
5. Linux/macOS build compatibility (Makefile)
- Conditionally apply macOS-only linker flag based on uname
6. Add SQLite integration tests (chunk_sqlite_test.go)
- TestCreateChunks_SQLite_SeqIDAutoAssigned
- TestCreateChunks_SQLite_SeqIDContinuesFromExisting
- TestCreateChunks_SQLite_SeqIDUniqueAcrossKBs
- TestCreateChunks_SQLite_SeqIDAfterSoftDelete
- TestKnowledgeTag_SQLite_SeqIDAutoAssigned
- TestUpdateChunk_SQLite_NoNOWError
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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