Fix Railway deployment configuration and dependencies

- Update railway.json to use absolute paths instead of cd commands
- Remove duplicate graphiti-core dependency from mcp_server/pyproject.toml
- Configure proper PYTHONPATH for Railway deployment context

🤖 Generated with [Claude Code](https://claude.ai/code)

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

mcp_server/pyproject.toml

@@ -9,5 +9,4 @@ dependencies = [
     "openai>=1.68.2",
     "graphiti-core>=0.14.0",
     "azure-identity>=1.21.0",
-    "graphiti-core",
 ]

railway.json

@@ -1,10 +1,10 @@
 {
   "$schema": "https://railway.app/railway.schema.json",
   "build": {
-    "buildCommand": "cd mcp_server && uv sync"
+    "buildCommand": "uv sync --directory mcp_server"
   },
   "deploy": {
-    "startCommand": "cd mcp_server && python graphiti_mcp_server.py --transport sse --host 0.0.0.0 --port 8080",
+    "startCommand": "PYTHONPATH=/app/mcp_server python /app/mcp_server/graphiti_mcp_server.py --transport sse --host 0.0.0.0 --port 8080",
     "restartPolicyType": "on_failure",
     "restartPolicyMaxRetries": 10
   }