feat: MLOps external services, AI stack planning, admin MLOps hub

Infrastructure:
- Add `mlops` compose profile: MLflow (basic-auth, /mlflow path) + Airflow (LocalExecutor, /airflow path) + airflow-db
- infra/mlflow/basic_auth.ini for MLflow auth config
- Caddy routes /mlflow* and /airflow* inside existing o.alogins.net block (see agap_git)
- Dockerfile.admin: NEXT_PUBLIC_MLFLOW_URL / NEXT_PUBLIC_AIRFLOW_URL build args (default /mlflow, /airflow)

Admin panel:
- /admin/models: replace MLflow iframe with external link cards
- /admin/experiments: replace LinUCB stats with MLOps hub (links to MLflow experiments/models + Airflow DAGs/datasets)
- AdminShell: external nav links for MLflow ↗ and Airflow ↗ under MLOps section

Docs & planning:
- README: new AI stack section (Ollama/LiteLLM/OpenWebUI three-tier, tip generation pipeline, model aliases)
- README: Phase 2 expanded with AI infra issues (#86-#93) and granular pipeline breakdown
- README: Phase 4 expanded with LLM MLOps items (#94-#97)
- CLAUDE.md: AI stack section, updated current phase (M1 shipped / M2 in progress), compose profiles, updated What NOT to do
- docs/architecture/overview.md: AI stack section, updated decision flow diagram for Phase 2 LLM pipeline
- ADR-0006: updated to reflect external services (path-based, not embedded)
- Gitea issues #86-#97 created (M2: AI infra + pipeline; M4: LLM MLOps)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/api/src/test/db.ts

@@ -41,6 +41,8 @@ export function makeTestDb() {
       tip_id TEXT NOT NULL,
       action TEXT NOT NULL,
       source_id TEXT,
+      dwell_ms INTEGER,
+      reward_milli INTEGER,
       created_at TEXT NOT NULL
     );
 
@@ -76,6 +78,60 @@ export function makeTestDb() {
       detail TEXT,
       created_at TEXT NOT NULL
     );
+
+    CREATE TABLE IF NOT EXISTS tip_scores (
+      id TEXT PRIMARY KEY,
+      user_id TEXT NOT NULL REFERENCES users(id),
+      tip_id TEXT NOT NULL,
+      policy TEXT NOT NULL,
+      ml_score INTEGER,
+      features_json TEXT,
+      candidate_count INTEGER,
+      latency_ms INTEGER,
+      served_at TEXT NOT NULL
+    );
+
+    CREATE TABLE IF NOT EXISTS saved_queries (
+      id TEXT PRIMARY KEY,
+      admin_id TEXT NOT NULL REFERENCES users(id),
+      name TEXT NOT NULL,
+      sql TEXT NOT NULL,
+      created_at TEXT NOT NULL
+    );
+
+    CREATE TABLE IF NOT EXISTS sim_runs (
+      id TEXT PRIMARY KEY,
+      policy_a TEXT NOT NULL,
+      policy_b TEXT NOT NULL,
+      n_users INTEGER NOT NULL,
+      n_rounds INTEGER NOT NULL,
+      tasks_per_round INTEGER NOT NULL DEFAULT 8,
+      use_llm INTEGER NOT NULL DEFAULT 0,
+      status TEXT NOT NULL DEFAULT 'pending',
+      summary_json TEXT,
+      winner TEXT,
+      persona_breakdown_json TEXT,
+      created_at TEXT NOT NULL,
+      finished_at TEXT
+    );
+
+    CREATE TABLE IF NOT EXISTS sim_events (
+      id TEXT PRIMARY KEY,
+      run_id TEXT NOT NULL REFERENCES sim_runs(id),
+      round INTEGER NOT NULL,
+      user_id TEXT NOT NULL,
+      persona TEXT NOT NULL,
+      policy TEXT NOT NULL,
+      tip_content TEXT NOT NULL,
+      priority INTEGER NOT NULL,
+      is_overdue INTEGER NOT NULL,
+      action TEXT NOT NULL,
+      dwell_ms INTEGER,
+      reward_milli INTEGER NOT NULL,
+      hour INTEGER NOT NULL,
+      day_of_week INTEGER NOT NULL,
+      created_at TEXT NOT NULL
+    );
   `);
 
   return drizzle(sqlite, { schema });