database.rs:
- search_by_tags: replace string-interpolated LIKE with parameterized ?N bindings
- search_by_notes: replace format!() SQL with prepared statement + ?1/?2 params
- search_by_set_file: same — use ?1 for pattern and ?2 for limit
backtest.rs (extract_and_store / monitor_backtest_completion):
- extract_and_store now returns bool — callers only delete report file if true
- guard both success paths with conditional delete + warning on failure
- replace .parent().unwrap() panic with explicit match + error log + graceful return
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
**Report Database (src/storage/):**
- New SQLite-based report registry for tracking backtest history
- ReportDb with methods: init, list, count, annotate, list_purgeable, delete_entry
- Charts relocation to temp directory with automatic cleanup
- Set file snapshotting alongside extracted data
- Database registration integrated into backtest pipeline
**compile_ea Tool Improvements:**
- Support both 'expert' (EA name) and 'expert_path' (full path) parameters
- Auto-discovery: searches MT5 Experts dir and current directory for .mq5 files
- Better error messages when EA not found
- Added files_synced and warning_list to response
- Updated tool definition to reflect new parameters
**Pipeline Updates:**
- Backtest pipeline now registers results in database after completion
- Equity charts moved to OS temp dir with unique report ID
- HTML reports cleaned up after extraction
- Set file snapshots preserved for reproducibility
**Dependencies:**
- Added rusqlite for SQLite database support
