Initial LiteLLM API Gateway Railway template

Multi-service deploy: LiteLLM proxy + PostgreSQL + Redis.
Universal LLM gateway with 100+ provider support.

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

railway.json

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://railway.com/railway.schema.json",
+  "build": {
+    "builder": "DOCKERFILE",
+    "dockerfilePath": "Dockerfile"
+  },
+  "deploy": {
+    "healthcheckPath": "/health/liveliness",
+    "healthcheckTimeout": 300,
+    "restartPolicyType": "ON_FAILURE",
+    "restartPolicyMaxRetries": 3
+  }
+}