feat(P06): integration \u0026 hardening — version 0.8.0, agent tests, E2E, docs, fallbacks

---ci---
project: ci
phase: 6
milestone: v0.8
status: complete
decisions:
  - id: D-037
    decision: v0.8.0 release with 6 phases complete
    rationale: All verification layers now deliver what they claim
    confidence: 0.95
requirements:
  covered: [INT-01, INT-02, INT-03, INT-04, INT-05, INT-06, INT-07, INT-08]
---/ci---

INT-06: Version bumped to 0.8.0 in package.json and src/version.ts.

INT-07: New test suites for SecurityAuditorAgent (5 tests), DocWriterAgent
(5 tests), DebuggerAgent (5 tests), ChallengerAgent (4 tests).

INT-08: Zod validation test suite with 9 cases: valid input, missing
fields, path traversal, absolute paths, contradictory success+error,
invalid operation, negative tokens, fail+error, emptyBackendResult.

INT-04: ciagent review command now has mechanical fallback — runs
CodeReviewerAgent regex review without backend.

INT-05: ciagent debug command now has mechanical fallback — runs
DebuggerAgent stack trace parsing + git bisect without backend.

INT-01: E2E verification test — fixture with defects fails L3/L4; clean
project passes all 4 layers.

INT-02: AGENTS.md updated — removed 'not yet implemented' caveats for
L2/L3/L4; updated test count to 44 suites, 454 tests.

INT-03: PROJECT.md updated — removed Out of Scope for STRIDE,
multi-persona review, and behavioral test generation.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@continuous-intelligence/ciagent",
-  "version": "0.7.0",
+  "version": "0.8.0",
   "description": "Fully autonomous AI-driven software engineering harness - Continuous Intelligence",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",