Add PHP Analyzer Plugin and Composer Lock Data Handling

- Implemented the PhpAnalyzerPlugin to analyze PHP projects.
- Created ComposerLockData class to represent data from composer.lock files.
- Developed ComposerLockReader to load and parse composer.lock files asynchronously.
- Introduced ComposerPackage class to encapsulate package details.
- Added PhpPackage class to represent PHP packages with metadata and evidence.
- Implemented PhpPackageCollector to gather packages from ComposerLockData.
- Created PhpLanguageAnalyzer to perform analysis and emit results.
- Added capability signals for known PHP frameworks and CMS.
- Developed unit tests for the PHP language analyzer and its components.
- Included sample composer.lock and expected output for testing.
- Updated project files for the new PHP analyzer library and tests.

docs/modules/sbomservice/runbooks/airgap-parity-review.md

@@ -0,0 +1,31 @@
+# AirGap Parity Review — SBOM Service runtime/signals (Sprint 0140/0142)
+
+Status: Template published (2025-11-22)
+Owners: Observability Guild · SBOM Service Guild · Cartographer Guild · Runtime & Signals coordination (0140) · Concelier Core (schema fidelity)
+
+## Purpose
+Document a repeatable AirGap parity review for `/sbom/paths`, `/sbom/versions`, and SBOM event streams so SBOM-SERVICE-21-001..004 can move from BLOCKED to DOING once fixtures land.
+
+## Prerequisites
+- Link-Not-Merge v1 fixtures available under `docs/modules/sbomservice/fixtures/lnm-v1/` with `SHA256SUMS`.
+- Projection schema frozen (record SHA/commit).
+- Mock surface bundle hash and real scanner cache ETA published in sprint 0140 tracker.
+- CAS/provenance appendices (signals) frozen: `docs/signals/cas-promotion-24-002.md`, `docs/signals/provenance-24-003.md`.
+- Test environment with offline toggle enabled; mirrored packages only.
+
+## Checklist
+- Verify fixture integrity: run `sha256sum -c SHA256SUMS` in `fixtures/lnm-v1`.
+- Replay fixtures in offline mode; capture latency/p95/p99 for `/sbom/paths` and `/sbom/versions` with deterministic seeds.
+- Confirm tenant scoping and add-only evolution (no in-place updates) using two-tenant replay script.
+- Validate event envelopes (`sbom.version.created`) against CAS/provenance requirements; ensure DSSE fields present or `skip_reason: offline`.
+- Check orchestrator backpressure behavior with AirGap throttling; record SLO thresholds.
+- Capture logs/traces snapshots (if enabled) and redact secrets before attaching.
+
+## Outputs
+- Minutes + decisions appended to this file (Execution Notes section) with timestamps and owners.
+- Metrics table with p50/p95/p99 latency, error rate, and cache hit ratio.
+- Actions list with owners and due dates; blockers mirrored to sprint 0140/0142 Decisions & Risks.
+
+## Execution Notes
+- 2025-11-22: Template published; awaiting fixtures and review scheduling.
+