fix: qdrant_request empty body handling (use 'is not None' check)

Fix qdrant_request() to properly handle empty dict {} as body.
Python's 'if body' evaluates to False for empty dict, causing EOF error.

Changed:
- data = json.dumps(body).encode() if body is not None else None

Also cleaned up count_seeds() to use consistent body passing.

scripts/utils/qdrant_faces.py

@@ -41,7 +41,7 @@ BATCH_SIZE = int(os.environ.get("QDRANT_BATCH_SIZE", "100"))
 def qdrant_request(method: str, path: str, body: dict = None) -> dict:
     """Make HTTP request to Qdrant"""
     url = f"{QDRANT_URL}{path}"
-    data = json.dumps(body).encode() if body else None
+    data = json.dumps(body).encode() if body is not None else None
     req = urllib.request.Request(url, data=data, method=method)
     req.add_header("Content-Type", "application/json")
     req.add_header("Api-Key", QDRANT_API_KEY)
@@ -605,7 +605,7 @@ def count_seeds(source: str = None) -> int:
     """
     ensure_seeds_collection()
     
-    body = {}  # Always pass empty body for count
+    body = {}
     if source:
         body["filter"] = {
             "must": [
@@ -613,7 +613,7 @@ def count_seeds(source: str = None) -> int:
             ]
         }
     
-    result = qdrant_request("POST", f"/collections/{SEEDS_COLLECTION}/points/count", body if body else {})
+    result = qdrant_request("POST", f"/collections/{SEEDS_COLLECTION}/points/count", body)
     return result.get("result", {}).get("count", 0)