feat: Add Promotion-Time Attestations for Stella Ops

- Introduced a new document for promotion-time attestations, detailing the purpose, predicate schema, producer workflow, verification flow, APIs, and security considerations.
- Implemented the `stella.ops/promotion@v1` predicate schema to capture promotion evidence including image digest, SBOM/VEX artifacts, and Rekor proof.
- Defined producer responsibilities and workflows for CLI orchestration, signer responsibilities, and Export Center integration.
- Added verification steps for auditors to validate promotion attestations offline.

feat: Create Symbol Manifest v1 Specification

- Developed a specification for Symbol Manifest v1 to provide a deterministic format for publishing debug symbols and source maps.
- Defined the manifest structure, including schema, entries, source maps, toolchain, and provenance.
- Outlined upload and verification processes, resolve APIs, runtime proxy, caching, and offline bundle generation.
- Included security considerations and related tasks for implementation.

chore: Add Ruby Analyzer with Git Sources

- Created a Gemfile and Gemfile.lock for Ruby analyzer with dependencies on git-gem, httparty, and path-gem.
- Implemented main application logic to utilize the defined gems and output their versions.
- Added expected JSON output for the Ruby analyzer to validate the integration of the new gems and their functionalities.
- Developed internal observation classes for Ruby packages, runtime edges, and capabilities, including serialization logic for observations.

test: Add tests for Ruby Analyzer

- Created test fixtures for Ruby analyzer, including Gemfile, Gemfile.lock, main application, and expected JSON output.
- Ensured that the tests validate the correct integration and functionality of the Ruby analyzer with the specified gems.

docs/implplan/SPRINT_505_ops_devops_iii.md

@@ -23,3 +23,5 @@ DEVOPS-OBS-51-001 | TODO | Implement SLO evaluator service (burn rate calculator
 DEVOPS-OBS-52-001 | TODO | Configure streaming pipeline (NATS/Redis/Kafka) with retention, partitioning, and backpressure tuning for timeline events; add CI validation of schema + rate caps. Dependencies: DEVOPS-OBS-51-001. | DevOps Guild, Timeline Indexer Guild (ops/devops)
 DEVOPS-OBS-53-001 | TODO | Provision object storage with WORM/retention options (S3 Object Lock / MinIO immutability), legal hold automation, and backup/restore scripts for evidence locker. Dependencies: DEVOPS-OBS-52-001. | DevOps Guild, Evidence Locker Guild (ops/devops)
 DEVOPS-OBS-54-001 | TODO | Manage provenance signing infrastructure (KMS keys, rotation schedule, timestamp authority integration) and integrate verification jobs into CI. Dependencies: DEVOPS-OBS-53-001. | DevOps Guild, Security Guild (ops/devops)
+DEVOPS-SCAN-90-004 | TODO | Add a CI job that runs the scanner determinism harness against the release matrix (N runs per image), uploads `determinism.json`, and fails when score < threshold; publish artifact to release notes. Dependencies: SCAN-DETER-186-009/010. | DevOps Guild, Scanner Guild (ops/devops)
+DEVOPS-SYMS-90-005 | TODO | Deploy Symbols.Server (Helm/Terraform), manage MinIO/Mongo storage, configure tenant RBAC/quotas, and wire ingestion CLI into release pipelines with monitoring and backups. Dependencies: SYMS-SERVER-401-011/013. | DevOps Guild, Symbols Guild (ops/devops)