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2b4e720e36
fix: fail-fast on unresolvable SQLite path; stop temp_dirs masking startup errors Addresses #13634 (Bug 2 in full; Bug 1 diagnostics + docs — relative-path normalization deferred to a separate design decision per maintainer triage). - main.py: bind `temp_dirs = []` before the lifespan `try` so the shutdown `finally` cleanup never raises UnboundLocalError and masks the real startup error when failure occurs before bundle loading. - database/service.py: add get_sqlite_database_file_path() and check_sqlite_database_path(), surfacing an actionable error (resolved path, CWD anchoring, absolute-path guidance) when a SQLite DB's parent directory is missing — instead of the opaque "Error creating DB and tables". Diagnostics only: no path normalization, no directory creation, no rejection of currently-working relative paths. - database/utils.py: run the check in initialize_database() before creation. - docs: note that SQLite LANGFLOW_DATABASE_URL paths should be absolute. - tests: regression coverage for both bugs. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>