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_203_cli_iii.md

@@ -14,6 +14,8 @@ CLI-ORCH-32-001 | TODO | Implement `stella orch sources | DevEx/CLI Guild (src/C
 CLI-ORCH-33-001 | TODO | Add action verbs (`sources test. Dependencies: CLI-ORCH-32-001. | DevEx/CLI Guild (src/Cli/StellaOps.Cli)
 CLI-ORCH-34-001 | TODO | Provide backfill wizard (`--from/--to --dry-run`), quota management (`quotas get. Dependencies: CLI-ORCH-33-001. | DevEx/CLI Guild (src/Cli/StellaOps.Cli)
 CLI-PACKS-42-001 | TODO | Implement Task Pack commands (`pack plan/run/push/pull/verify`) with schema validation, expression sandbox, plan/simulate engine, remote execution. | DevEx/CLI Guild (src/Cli/StellaOps.Cli)
+CLI-PROMO-70-002 | TODO | Implement `stella promotion attest` / `promotion verify` commands that sign the promotion payload via Signer, retrieve DSSE bundles from Attestor, and perform offline verification against trusted checkpoints (`docs/release/promotion-attestations.md`). Dependencies: CLI-PROMO-70-001. | DevEx/CLI Guild, Provenance Guild (src/Cli/StellaOps.Cli)
+CLI-DETER-70-004 | TODO | Add `stella detscore report` to summarise published `determinism.json` files (overall score, per-image matrix) and integrate with release notes/air-gap kits (`docs/modules/scanner/determinism-score.md`). Dependencies: CLI-DETER-70-003. | DevEx/CLI Guild (src/Cli/StellaOps.Cli)
 CLI-PACKS-43-001 | TODO | Deliver advanced pack features (approvals pause/resume, secret injection, localization, man pages, offline cache). Dependencies: CLI-PACKS-42-001. | DevEx/CLI Guild (src/Cli/StellaOps.Cli)
 CLI-PARITY-41-001 | TODO | Deliver parity command groups (`policy`, `sbom`, `vuln`, `vex`, `advisory`, `export`, `orchestrator`) with `--explain`, deterministic outputs, and parity matrix entries. | DevEx/CLI Guild (src/Cli/StellaOps.Cli)
 CLI-PARITY-41-002 | TODO | Implement `notify`, `aoc`, `auth` command groups, idempotency keys, shell completions, config docs, and parity matrix export tooling. Dependencies: CLI-PARITY-41-001. | DevEx/CLI Guild (src/Cli/StellaOps.Cli)