refactor(infra): drop ai profile; ollama + litellm move to Agap

Ollama and LiteLLM are shared Agap services (agap_git/openai/docker-compose.yml);
oO never starts them. Removes the ai profile, the litellm config, and the
--profile ai runbook; points ml-serving at https://llm.alogins.net by default
and adds host.docker.internal host-gateway so the container can hit Agap ollama
on the host.

Also updates the tip-generator model alias to qwen2.5:1.5b to match the model
actually pulled on Agap ollama (7b is ~4.7 GB and would blow VRAM budget).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

infra/docker/docker-compose.yml

@@ -65,8 +65,10 @@ services:
     profiles: [full]
     env_file: ../../.env.local
     environment:
-      LITELLM_URL: ${LITELLM_URL:-http://litellm:4000}
-      OLLAMA_URL: ${OLLAMA_URL:-http://ollama:11434}
+      LITELLM_URL: ${LITELLM_URL:-https://llm.alogins.net}
+      OLLAMA_URL: ${OLLAMA_URL:-http://host.docker.internal:11434}
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     ports:
       - "127.0.0.1:8000:8000"
     healthcheck:
@@ -159,25 +161,6 @@ services:
       airflow-init:
         condition: service_completed_successfully
 
-  # ── ai profile — Ollama + LiteLLM ────────────────────────────────────────
-  # Start: docker compose --profile ai up
-  # LiteLLM proxy: http://localhost:4000  (master key from LITELLM_MASTER_KEY)
-  # Ollama API:    http://localhost:11434
-  # In prod both are shared Agap services; set LITELLM_URL + OLLAMA_URL in .env.local
-
-  ollama:
-    image: ollama/ollama:latest
-    profiles: [ai]
-    volumes:
-      - /mnt/ssd/dbs/oo/ollama:/root/.ollama
-    ports:
-      - "127.0.0.1:11434:11434"
-    healthcheck:
-      test: ["CMD", "curl", "--fail", "http://localhost:11434"]
-      interval: 15s
-      timeout: 5s
-      retries: 5
-
   # ── events profile — NATS JetStream ─────────────────────────────────────
   # Start: docker compose --profile events up
   # NATS monitoring: http://localhost:8222
@@ -198,26 +181,6 @@ services:
       timeout: 5s
       retries: 5
 
-  litellm:
-    image: ghcr.io/berriai/litellm:main-latest
-    profiles: [ai]
-    command: ["--config", "/app/litellm_config.yaml", "--port", "4000"]
-    environment:
-      LITELLM_MASTER_KEY: ${LITELLM_MASTER_KEY:-sk-oo-dev}
-      OLLAMA_URL: ${OLLAMA_URL:-http://ollama:11434}
-    volumes:
-      - ../../infra/litellm/litellm_config.yaml:/app/litellm_config.yaml:ro
-    ports:
-      - "127.0.0.1:4000:4000"
-    depends_on:
-      ollama:
-        condition: service_healthy
-    healthcheck:
-      test: ["CMD", "curl", "--fail", "http://localhost:4000/health"]
-      interval: 15s
-      timeout: 5s
-      retries: 5
-
   mlflow:
     image: ghcr.io/mlflow/mlflow:v2.14.3
     profiles: [mlops]