refactor(backend): verb-first names for the provisioning modules

Rename the module files to match their functions' verb-first names:
`bottle_provision.py` -> `provision_bottle.py`,
`gateway_provision.py` -> `provision_gateway.py` (and the test file to match).
Imports, docstrings, and the git_gate/service.py pointer updated.

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

tests/unit/test_consolidated_launch.py

@@ -15,7 +15,7 @@ from bot_bottle.git_gate import GitGatePlan
 from bot_bottle.orchestrator.client import RegisteredBottle
 
 _MOD = "bot_bottle.backend.docker.consolidated_launch"
-_UTIL = "bot_bottle.backend.bottle_provision"
+_UTIL = "bot_bottle.backend.provision_bottle"
 
 
 def _egress_plan() -> EgressPlan:

tests/unit/test_macos_consolidated_launch.py

@@ -17,7 +17,7 @@ from bot_bottle.git_gate import GitGatePlan
 from bot_bottle.orchestrator.client import RegisteredBottle
 
 _MOD = "bot_bottle.backend.macos_container.consolidated_launch"
-_UTIL = "bot_bottle.backend.bottle_provision"
+_UTIL = "bot_bottle.backend.provision_bottle"
 
 
 def _egress_plan() -> EgressPlan:

tests/unit/test_provision_gateway.py

@@ -6,7 +6,7 @@ import unittest
 from pathlib import Path
 from unittest.mock import Mock, patch
 
-from bot_bottle.backend.gateway_provision import (
+from bot_bottle.backend.provision_gateway import (
     GatewayProvisionError,
     deprovision_git_gate,
     provision_git_gate,