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KaifAhmad1
0a8330cbb0
- SQLiteStorage now migrates an existing (pre-#825) provenance.db in place
via ALTER TABLE ADD COLUMN for any columns introduced since, instead of
only ever running CREATE TABLE IF NOT EXISTS. Without this, opening an
older database with the new code would break on the first insert/select
since the row width and _row_to_entry's fixed indices grew past the old
schema. Added test_migrates_pre_existing_old_schema_database.
- verify_chain() now also checks that sequence_id is exactly the
predecessor's plus one (no gap, no duplicate), in addition to the existing
previous_checksum comparison. Hardens against the narrow case where
compute_checksum()'s deliberate exclusion of entity_id could let two
distinct rows coincidentally share a checksum, which alone would let a
checksum-only comparison miss a gap. Added
test_verify_chain_detects_tampered_sequence_gap.
- Explorer provenance route: edge ids now include direction
(f"{src}-{eid}-{direction}") to match the seen_edges dedupe key, which
already included it. The same (src, target) pair can legitimately appear
in both the upstream and downstream chains (cycles/overlap), and without
this the two edges collided on the same id. Added
test_add_chain_edges_ids_distinguish_direction.
- Removed an unused `Any` import in parse_provenance.py.