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    alternatives: [keep for historical reference]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.test.ts

@@ -14,12 +14,12 @@ describe("StructuralVerification", () => {
     fs.rmSync(tempDir, { recursive: true, force: true });
   });
 
-  function setupProjectStructure(hasPhaseDir = true, hasPlan = true, hasCIConfig = true, hasSpec = true) {
-    if (hasPhaseDir) {
-      const phaseDir = path.join(tempDir, ".planning", "phases", "phase-1");
-      fs.mkdirSync(phaseDir, { recursive: true });
-      if (hasPlan) {
-        fs.writeFileSync(path.join(phaseDir, "PLAN.md"), "# Plan\n\nTasks:\n- [ ] Task 1\n- [ ] Task 2\n");
+  function setupProjectStructure(hasCIDir = true, hasRoadmap = true, hasCIConfig = true, hasSpec = true) {
+    if (hasCIDir) {
+      const ciDir = path.join(tempDir, ".ci");
+      fs.mkdirSync(ciDir, { recursive: true });
+      if (hasRoadmap) {
+        fs.writeFileSync(path.join(ciDir, "ROADMAP.md"), "# Roadmap\n\n## Phases\n\n### Phase 1: Init\n**Goal**: Set up project\n**Status**: not_started\n");
       }
     }
     if (hasCIConfig) {
@@ -43,10 +43,10 @@ describe("StructuralVerification", () => {
     expect(result.name).toBe("Structural");
     expect(result.checks.length).toBeGreaterThan(0);
 
-    const phaseDirCheck = result.checks.find((c) => c.name === "Phase directory exists");
+    const phaseDirCheck = result.checks.find((c) => c.name === ".ci directory exists");
     expect(phaseDirCheck?.status).toBe("pass");
 
-    const planCheck = result.checks.find((c) => c.name === "PLAN.md exists");
+    const planCheck = result.checks.find((c) => c.name === "ROADMAP.md exists");
     expect(planCheck?.status).toBe("pass");
 
     const configCheck = result.checks.find((c) => c.name === "CI config valid");
@@ -56,29 +56,29 @@ describe("StructuralVerification", () => {
     expect(specCheck?.status).toBe("pass");
   });
 
-  it("fails when phase directory is missing", async () => {
-    setupProjectStructure(false, false, true, true);
+  it("fails when .ci directory is missing", async () => {
+    setupProjectStructure(false, false, false, false);
     const verifier = new StructuralVerification();
     const result = await verifier.verify(tempDir, 1);
 
-    const phaseDirCheck = result.checks.find((c) => c.name === "Phase directory exists");
+    const phaseDirCheck = result.checks.find((c) => c.name === ".ci directory exists");
     expect(phaseDirCheck?.status).toBe("fail");
   });
 
-  it("fails when PLAN.md is missing", async () => {
+  it("warns when ROADMAP.md is missing", async () => {
     setupProjectStructure(true, false, true, true);
     const verifier = new StructuralVerification();
     const result = await verifier.verify(tempDir, 1);
 
-    const planCheck = result.checks.find((c) => c.name === "PLAN.md exists");
-    expect(planCheck?.status).toBe("fail");
+    const planCheck = result.checks.find((c) => c.name === "ROADMAP.md exists");
+    expect(planCheck?.status).toBe("warning");
   });
 
   it("fails when CI config has invalid JSON", async () => {
     const ciDir = path.join(tempDir, ".ci");
     fs.mkdirSync(ciDir, { recursive: true });
     fs.writeFileSync(path.join(ciDir, "config.json"), "not valid json{{{");
-    fs.mkdirSync(path.join(tempDir, ".planning", "phases", "phase-1"), { recursive: true });
+    fs.mkdirSync(path.join(tempDir, ".ci"), { recursive: true });
 
     const verifier = new StructuralVerification();
     const result = await verifier.verify(tempDir, 1);
@@ -91,8 +91,6 @@ describe("StructuralVerification", () => {
     const srcDir = path.join(tempDir, "src");
     fs.mkdirSync(srcDir, { recursive: true });
     fs.writeFileSync(path.join(srcDir, "app.ts"), "export function main() { /* TODO: implement */ }");
-    fs.mkdirSync(path.join(tempDir, ".planning", "phases", "phase-1"), { recursive: true });
-    fs.writeFileSync(path.join(tempDir, ".planning", "phases", "phase-1", "PLAN.md"), "# Plan");
     const ciDir = path.join(tempDir, ".ci");
     fs.mkdirSync(ciDir, { recursive: true });
     fs.writeFileSync(path.join(ciDir, "config.json"), "{}");