Fix Phase 1 server validation defects

ansible/roles/cezen-backend/files/rag_ingest.py

@@ -162,9 +162,9 @@ def chunk_text(text: str, chunk_size: int = CHUNK_SIZE, overlap: int = CHUNK_OVE
                     chunk = chunk[:idx + len(sep)]
                     break
         chunks.append(chunk.strip())
-        start += len(chunk) - overlap
-        if start >= len(text):
+        if end >= len(text):
             break
+        start += max(1, len(chunk) - overlap)
     return [c for c in chunks if c]
 
 # ── Embedding ─────────────────────────────────────────────────────────────────
@@ -197,8 +197,10 @@ def chroma_upsert(ids, embeddings, documents, metadatas):
         "documents":  documents,
         "metadatas":  metadatas,
     }).encode()
+    with urllib.request.urlopen(f"{args.chroma_url}/api/v1/collections/{args.collection}", timeout=30) as response:
+        collection_id = json.loads(response.read().decode())["id"]
     req = urllib.request.Request(
-        f"{args.chroma_url}/api/v1/collections/{args.collection}/upsert",
+        f"{args.chroma_url}/api/v1/collections/{collection_id}/upsert",
         data=body, method="POST"
     )
     req.add_header("Content-Type", "application/json")