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d8910d6571
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feat: add database module with connection factory and transactions
Implements Step 1.2:
- constants.py: END_OF_TIME_UTC = 32503680000000 (year 3000 sentinel)
- db.py: get_db() with pragmas (WAL, synchronous=FULL, foreign_keys, busy_timeout)
- db.py: transaction() context manager with BEGIN IMMEDIATE
Includes 12 TDD tests for pragmas, commit/rollback, and concurrent writes.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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2025-12-27 17:58:29 +00:00 |
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