feat(ci): v0.9.0 — Distribution & Expansion milestone complete

---ci---
project: ci
phase: 6
milestone: v0.9
status: complete
artifacts:
  tags: [v0.9.0]
decisions:
  - id: D-047
    decision: v0.9 theme = Distribution & Expansion
    rationale: npm publish + OpenAI/Anthropic backends + agent flesh + parallel execution
    confidence: 0.92
  - id: D-049
    decision: Feature milestone — patch tags v0.8.1-v0.8.6 then v0.9.0
    rationale: OpenAI backend, agent flesh, npm publish all feat
    confidence: 0.95
  - id: D-059
    decision: Rename OllamaBaseBackend to LLMBaseBackend + thin OllamaBaseBackend subclass
    rationale: 15 of 17 methods backend-agnostic
    confidence: 0.92
  - id: D-060
    decision: OpenAI/Anthropic backends use native fetch() not SDK packages
    rationale: No dependency bloat; fetch native in Node 18+
    confidence: 0.85
  - id: D-066
    decision: Concurrency limiter internal (no p-limit dependency)
    rationale: 15 lines; avoids dependency for trivial feature
    confidence: 0.90
  - id: D-067
    decision: Promise.allSettled for review agents at orchestrator lines 373-400
    rationale: Current sequential loop replaced with parallel execution
    confidence: 0.88
requirements:
  covered: [PUBLISH-01, PUBLISH-02, PUBLISH-03, PUBLISH-04, OPENAI-01, OPENAI-02, OPENAI-03, OPENAI-04, OPENAI-05, FLESH-01, FLESH-02, FLESH-03, FLESH-04, FLESH-05, ANTHROPIC-01, ANTHROPIC-02, FLESH-06, FLESH-07, NPM-01, NPM-02, PARALLEL-01, PARALLEL-02, PARALLEL-03, INTEG-01, INTEG-02, INTEG-03, INTEG-04, INTEG-05]
---/ci---

6 phases, 28 tasks, 4077 net lines added, 57 test suites, 527 tests, zero stub agents

src/types/config.ts

@@ -132,6 +132,13 @@ export const DEFAULT_CIAGENT_CONFIG: CIAgentConfig = {
       opencode: { enabled: true },
     },
     llm_backends: {
+      "openai": {
+        base_url: "https://api.openai.com/v1",
+        api_key_env: "OPENAI_API_KEY",
+        model: "gpt-4o",
+        model_profile: "quality",
+        timeout_ms: 60000,
+      },
       "ollama-local": {
         base_url: "http://localhost:11434",
         model_profile: "balanced",
@@ -142,6 +149,14 @@ export const DEFAULT_CIAGENT_CONFIG: CIAgentConfig = {
         model_profile: "quality",
         timeout_ms: 60000,
       },
+      "anthropic": {
+        base_url: "https://api.anthropic.com",
+        api_key_env: "ANTHROPIC_API_KEY",
+        model: "claude-sonnet-4-20250514",
+        api_version: "2023-06-01",
+        model_profile: "quality",
+        timeout_ms: 60000,
+      },
     },
   },
   gitea: {