release(v0.4.0): purge learnship, migrate .planning→.ci, fix backends, add test coverage

- Remove all learnship references: Decision.learnship_equivalent field,
  agent persona prompts, opencode.json permissions, test fixtures
- Migrate verification layers from .planning/ to .ci/: structural
  checks .ci/ dir + ROADMAP.md, behavioral checks ROADMAP.md
- Fix ollama-local: remove sync require+curl blocking, use async
  fetchAvailableModels() in callModel
- Fix opencode.json: use __OPENCODE_DIR__ template tokens, remove
  legacy learnship permission entries
- Remove duplicate install script from package.json (keep postinstall)
- Fix quality any-regex false positives (target type annotations only)
- Add backends test coverage: backends.test.ts, tool-registry.test.ts
- Version bump 0.3.0 → 0.4.0
- Artifacts module: rename .planning→.ci internal paths
- Remove dead TODO_PATTERN/FIXME_PATTERN constants

---ci---
phase: 3
milestone: v0.4
status: complete
requirements:
  covered: [REQ-09, REQ-10, REQ-11, REQ-13, REQ-14, REQ-17]
  partial: []
decisions:
  - id: D-001
    decision: purge all learnship references from codebase
    rationale: project is CI-only, learnship is no longer a dependency
    confidence: 0.99
    category: scope
    alternatives: [keep for historical reference]
  - id: D-002
    decision: migrate verification from .planning/ to .ci/ paths
    rationale: .planning/ is removed schema, all current state lives in .ci/
    confidence: 0.95
    category: architecture
    alternatives: [keep dual-path support]
  - id: D-003
    decision: use __OPENCODE_DIR__ template tokens in opencode.json
    rationale: hardcoded ~ paths fail in containers and non-standard homes
    confidence: 0.90
    category: implementation_approach
    alternatives: [keep tilde expansion]
---/ci---

src/backends/ollama-base.ts

@@ -153,7 +153,7 @@ export abstract class OllamaBaseBackend implements IntelligenceBackend {
       '  "success": true,',
       '  "output": "Summary of what was accomplished",',
       '  "artifacts": [{"path": "file/path", "content": "...", "operation": "create"}],',
-      '  "decisions": [{"id": "D-NNN", "decision": "what", "rationale": "why", "confidence": 0.85, "category": "general", "alternatives_considered": [], "learnship_equivalent": "", "human_override": null, "timestamp": ""}],',
+      '  "decisions": [{"id": "D-NNN", "decision": "what", "rationale": "why", "confidence": 0.85, "category": "general", "alternatives_considered": [], "human_override": null, "timestamp": ""}],',
       '  "escalations": []',
       '}',
       "```"
@@ -241,7 +241,6 @@ export abstract class OllamaBaseBackend implements IntelligenceBackend {
               : (a as { option: string; rejected_reason: string })
           )
         : [],
-      learnship_equivalent: String(d.learnship_equivalent || ""),
       human_override: d.human_override ? String(d.human_override) : null,
       timestamp: String(d.timestamp || new Date().toISOString()),
     }));