Fix MCP server httpx redirect handling

Add follow_redirects=True to httpx Client so 307 redirects (FastAPI
trailing-slash redirects) are followed transparently. Also add trailing
slash normalisation to _get and _patch to match existing _post behaviour,
so all three helpers hit the correct URLs on first attempt.

Requires Claude Code restart to take effect (MCP server is a subprocess
launched at startup).

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

mcp_server/server.py

@@ -32,10 +32,12 @@ mcp = FastMCP(
 # ---------------------------------------------------------------------------
 
 def _client() -> httpx.Client:
-    return httpx.Client(base_url=API_BASE, timeout=30.0)
+    return httpx.Client(base_url=API_BASE, timeout=30.0, follow_redirects=True)
 
 
 def _get(path: str, params: dict | None = None) -> Any:
+    if not path.endswith("/"):
+        path = path + "/"
     with _client() as c:
         r = c.get(path, params={k: v for k, v in (params or {}).items() if v is not None})
         r.raise_for_status()
@@ -52,6 +54,8 @@ def _post(path: str, body: dict) -> Any:
 
 
 def _patch(path: str, body: dict) -> Any:
+    if not path.endswith("/"):
+        path = path + "/"
     with _client() as c:
         r = c.patch(path, json={k: v for k, v in body.items() if v is not None})
         r.raise_for_status()