feat: unify installation model catalog

harness/tests/test_local_compose_contract.py

@@ -34,8 +34,13 @@ def test_local_compose_uses_the_generic_external_endpoint_contract():
         assert name in environment
     assert environment["THT_INTERNAL_QDRANT_URL"] == "http://qdrant:6333"
     assert environment["THT_INTERNAL_EMBEDDING_URL"] == "http://embedding:11434"
-    assert environment["THT_INTERNAL_EMBEDDING_MODEL"] == "qwen3-embedding:0.6b"
-    assert environment["THT_INTERNAL_EMBEDDING_DIMENSIONS"] == "1024"
+    # Identity and dimensions come only from the installation-generated Compose projection.
+    for name in (
+        "THT_INTERNAL_EMBEDDING_ID",
+        "THT_INTERNAL_EMBEDDING_MODEL",
+        "THT_INTERNAL_EMBEDDING_DIMENSIONS",
+    ):
+        assert name not in environment
     for name in ("THT_VEC_REST_URL", "THT_VEC_WRITE_REST_URL", "THT_OLLAMA_URL"):
         assert name not in environment
 
@@ -53,6 +58,7 @@ def test_local_compose_uses_the_generic_external_endpoint_contract():
 
     model_init = compose["services"]["embedding-model-init"]
     assert "ports" not in model_init
+    assert "OLLAMA_MODEL" not in model_init.get("environment", {})
     assert model_init["depends_on"]["embedding"]["condition"] == "service_healthy"
     assert compose["services"]["core"]["depends_on"]["embedding-model-init"]["condition"] == "service_completed_successfully"