refactor: retire external vector deployment

deploy/compose.preprocess.yaml

@@ -9,13 +9,17 @@ services:
     command: ["mkdir -p /data/workspaces/preprocess-evidence && exec /app/docker/core-entrypoint.sh preprocess evidence --json -c /app/harness/workspaces/preprocess-evidence.yaml"]
     environment:
       THT_DATA_ROOT: /data
-      THT_OLLAMA_URL: "${THT_OLLAMA_URL:-http://host.docker.internal:11434}"
       THT_SECRETS_FILE: /run/secrets/thothii.secrets
     secrets: [{source: thothii_secrets, target: thothii.secrets}]
     volumes:
       - thoth_data:/data
       - ./deploy/workspaces:/app/harness/workspaces:ro
     restart: "no"
+    depends_on:
+      qdrant:
+        condition: service_healthy
+      embedding-model-init:
+        condition: service_completed_successfully
 
   preprocess-dwh:
     image: thothii-core:local