Fixed 3 bugs in Aphoria's claim verification engine that were causing
false positives in Maxwell validation testing:
**Bug 1: Path matching + predicate filtering**
- Added predicate filtering to prevent cross-predicate matches
- Added path prefix matching to respect crate boundaries
- Prevents core/imports/serde from matching hypervisor/vsock/imports/serde
**Bug 2: Value-specific absent checks**
- Absent mode now checks for specific forbidden value, not any observation
- Example: "Clone absent" + "Debug present" = PASS (not CONFLICT)
- Only conflicts when the exact forbidden value is found
**Bug 3: Wildcard pattern support**
- Wildcard patterns like message/*/derives now match multiple paths
- Enhanced wildcard_matches() to support prefix/*/suffix patterns
- Correctly strips full scheme+language from observation paths
**Test coverage:**
- All 39 existing tests passing
- 3 new tests added for bug fixes
- 2 tests updated to use correct predicates
- Zero clippy warnings
**Maxwell validation:**
- maxwell-core-no-serde-001: CONFLICT → PASS (respects path boundaries)
- maxwell-singleton-no-clone-001: CONFLICT → PASS (value-specific absent)
- 5 claims now correctly show as MISSING (expose predicate mismatches)
The fixes successfully eliminate false positives while exposing pre-existing
issues where claims used incorrect predicates.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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