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    alternatives: [keep for historical reference]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/verification/structural.ts

@@ -13,9 +13,6 @@ const STUB_PATTERNS = [
   /not\s+implemented/i,
 ];
 
-const TODO_PATTERN = /\bTODO\b/gi;
-const FIXME_PATTERN = /\bFIXME\b/gi;
-
 export class StructuralVerification extends VerificationLayer {
   readonly layer = 1;
   readonly name = "Structural";
@@ -44,30 +41,24 @@ export class StructuralVerification extends VerificationLayer {
   }
 
   private checkPhaseDir(projectPath: string, phase: number) {
-    const phaseDir = path.join(projectPath, ".planning", "phases", `phase-${phase}`);
-    const exists = fs.existsSync(phaseDir);
+    const ciDir = path.join(projectPath, ".ci");
+    const exists = fs.existsSync(ciDir);
     return this.check(
-      "Phase directory exists",
+      ".ci directory exists",
       exists ? "pass" : "fail",
-      exists ? `Phase ${phase} directory found` : `Phase ${phase} directory not found`,
-      phaseDir
+      exists ? ".ci directory found" : ".ci directory not found",
+      ciDir
     );
   }
 
   private checkPlanExists(projectPath: string, phase: number) {
-    const planPath = path.join(
-      projectPath,
-      ".planning",
-      "phases",
-      `phase-${phase}`,
-      "PLAN.md"
-    );
-    const exists = fs.existsSync(planPath);
+    const roadmapPath = path.join(projectPath, ".ci", "ROADMAP.md");
+    const exists = fs.existsSync(roadmapPath);
     return this.check(
-      "PLAN.md exists",
-      exists ? "pass" : "fail",
-      exists ? "PLAN.md found" : "PLAN.md not found",
-      planPath
+      "ROADMAP.md exists",
+      exists ? "pass" : "warning",
+      exists ? "ROADMAP.md found" : "ROADMAP.md not found (run 'ci init' first)",
+      roadmapPath
     );
   }