feat: add Coolify deployment configuration

Add docker-compose.coolify.yml (17 services), .env.coolify.example,
and Gitea Action workflow for Coolify API deployment. Removes nginx,
vault, gitea, woodpecker, mailpit, and dev-only services. Adds Traefik
labels for *.breakpilot.ai domain routing with Let's Encrypt SSL.

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

.env.coolify.example

@@ -0,0 +1,71 @@
+# =========================================================
+# BreakPilot Core — Coolify Environment Variables
+# =========================================================
+# Copy these into Coolify's environment variable UI
+# for the breakpilot-core Docker Compose resource.
+# =========================================================
+
+# --- Database ---
+POSTGRES_USER=breakpilot
+POSTGRES_PASSWORD=CHANGE_ME_STRONG_PASSWORD
+POSTGRES_DB=breakpilot_db
+
+# --- Security ---
+JWT_SECRET=CHANGE_ME_RANDOM_64_CHARS
+JWT_REFRESH_SECRET=CHANGE_ME_ANOTHER_RANDOM_64_CHARS
+INTERNAL_API_KEY=CHANGE_ME_INTERNAL_KEY
+
+# --- MinIO (S3 Object Storage) ---
+MINIO_ROOT_USER=breakpilot
+MINIO_ROOT_PASSWORD=CHANGE_ME_MINIO_PASSWORD
+MINIO_BUCKET=breakpilot-rag
+
+# --- SMTP (Real mail server, not Mailpit) ---
+SMTP_HOST=smtp.example.com
+SMTP_PORT=587
+SMTP_USERNAME=noreply@breakpilot.ai
+SMTP_PASSWORD=CHANGE_ME_SMTP_PASSWORD
+SMTP_FROM_NAME=BreakPilot
+SMTP_FROM_ADDR=noreply@breakpilot.ai
+
+# --- Session ---
+SESSION_TTL_HOURS=24
+
+# --- Frontend URLs (build args) ---
+NEXT_PUBLIC_CORE_API_URL=https://api-core.breakpilot.ai
+FRONTEND_URL=https://www.breakpilot.ai
+
+# --- Stripe (Billing) ---
+STRIPE_SECRET_KEY=
+STRIPE_WEBHOOK_SECRET=
+STRIPE_PUBLISHABLE_KEY=
+BILLING_SUCCESS_URL=https://www.breakpilot.ai/billing/success
+BILLING_CANCEL_URL=https://www.breakpilot.ai/billing/cancel
+TRIAL_PERIOD_DAYS=14
+
+# --- Embedding Service ---
+EMBEDDING_BACKEND=local
+LOCAL_EMBEDDING_MODEL=sentence-transformers/all-MiniLM-L6-v2
+LOCAL_RERANKER_MODEL=cross-encoder/ms-marco-MiniLM-L-6-v2
+PDF_EXTRACTION_BACKEND=pymupdf
+OPENAI_API_KEY=
+COHERE_API_KEY=
+LOG_LEVEL=INFO
+
+# --- Ollama (optional, if running on same server) ---
+OLLAMA_BASE_URL=
+OLLAMA_URL=
+OLLAMA_VOICE_MODEL=
+
+# --- Matrix/Synapse ---
+SYNAPSE_DB_PASSWORD=CHANGE_ME_SYNAPSE_DB_PASSWORD
+SYNAPSE_SERVER_NAME=chat.breakpilot.ai
+SYNAPSE_ENABLE_REGISTRATION=false
+SYNAPSE_LOG_LEVEL=WARNING
+
+# --- Jitsi ---
+JICOFO_AUTH_PASSWORD=CHANGE_ME_JICOFO_PASSWORD
+JVB_AUTH_PASSWORD=CHANGE_ME_JVB_PASSWORD
+JITSI_ENABLE_AUTH=false
+JVB_STUN_SERVERS=stun.l.google.com:19302
+TZ=Europe/Berlin