api: convert /health to POST and update README

README.md

@@ -127,9 +127,9 @@ curl -X POST {YOUR_ENDPOINT_URL}/ingest
 - The index will be stored under `.vector_index` (persist if using a volume)
 
 ### 7) Test the API
-- Health:
+# Health (POST):
 ```
-curl -s {YOUR_ENDPOINT_URL}/health
+curl -X POST {YOUR_ENDPOINT_URL}/health
 ```
 - Query:
 ```

app/api.py

@@ -32,8 +32,12 @@ class QueryResponse(BaseModel):
     results: List[Dict[str, Any]]
 
 
-@app.get("/health")
+@app.post("/health")
 def health() -> Dict[str, str]:
+    """Healthcheck endpoint.
+
+    Converted to POST so all endpoints consistently use JSON/POST semantics.
+    """
     return {"status": "ok"}