feat: Add VEX compact fixture and implement offline verifier for Findings Ledger exports

- Introduced a new VEX compact fixture for testing purposes.
- Implemented `verify_export.py` script to validate Findings Ledger exports, ensuring deterministic ordering and applying redaction manifests.
- Added a lightweight stub `HarnessRunner` for unit tests to validate ledger hashing expectations.
- Documented tasks related to the Mirror Creator.
- Created models for entropy signals and implemented the `EntropyPenaltyCalculator` to compute penalties based on scanner outputs.
- Developed unit tests for `EntropyPenaltyCalculator` to ensure correct penalty calculations and handling of edge cases.
- Added tests for symbol ID normalization in the reachability scanner.
- Enhanced console status service with comprehensive unit tests for connection handling and error recovery.
- Included Cosign tool version 2.6.0 with checksums for various platforms.

docs/modules/findings-ledger/README.md

@@ -2,3 +2,9 @@
 # Findings Ledger
 
 Start here for ledger docs.
+
+## Quick links
+- FL1–FL10 remediation tracker: `gaps-FL1-FL10.md`
+- Schema catalog (events/projections/exports): `schema-catalog.md`
+- Merkle & external anchor policy: `merkle-anchor-policy.md`
+- Tenant isolation & redaction manifest: `tenant-isolation-redaction.md`