refactor(backend): split bottle vs gateway provisioning modules

Rename `consolidated_util` -> `bottle_provision` and align it with
`gateway_provision` as the two provisioning domains: `bottle_provision` owns
the bottle lifecycle (`provision_bottle` + `deprovision_bottle`, the latter
renamed from `teardown_consolidated`), `gateway_provision` owns the git-gate
state pushed through the transport (`provision_git_gate`/`deprovision_git_gate`).

The three backends' consolidated_launch modules import from the new module;
their own public `teardown_consolidated` wrappers (called by launch.py) keep
their names.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

bot_bottle/backend/docker/consolidated_launch.py

@@ -24,8 +24,7 @@ from ...gateway import GATEWAY_NETWORK
 from .infra import INFRA_NAME, DockerInfraService
 from ...orchestrator.store.secret_store import ENV_VAR_SECRET_NAME
 from ...orchestrator.reprovision import reprovision_bottles
-from ..consolidated_util import provision_bottle
-from ..consolidated_util import teardown_consolidated as _teardown_util
+from ..bottle_provision import deprovision_bottle, provision_bottle
 from .gateway_transport import DockerGatewayTransport
 from .gateway_net import next_free_ip
 
@@ -174,7 +173,7 @@ def teardown_consolidated(
     timeout: float | None = None,
 ) -> None:
     """Deregister the bottle and remove its git-gate state. Idempotent."""
-    _teardown_util(bottle_id, DockerGatewayTransport(infra_name),
+    deprovision_bottle(bottle_id, DockerGatewayTransport(infra_name),
                    orchestrator_url=orchestrator_url, timeout=timeout)