fix: make orchestrator teardown timeout configurable (closes #435)

Resolves via ENV VAR -> orchestrator DB config -> default (30 s, up from 5 s):
  BOT_BOTTLE_ORCHESTRATOR_TEARDOWN_TIMEOUT_SECONDS
  teardown_timeout_seconds key in new orchestrator_config table (bot-bottle.db)

New OrchestratorConfigStore (same DbStore/TableMigrations pattern as the
registry) stores the DB-level setting. resolve_teardown_timeout() implements
the priority chain and is called at stack.callback registration time in all
three backends (macos_container, docker, firecracker).

bot_bottle/backend/firecracker/consolidated_launch.py

@@ -91,12 +91,18 @@ def launch_consolidated(
     )
 
 
-def teardown_consolidated(bottle_id: str, *, orchestrator_url: str) -> None:
+def teardown_consolidated(
+    bottle_id: str, *, orchestrator_url: str, timeout: float | None = None,
+) -> None:
     """Deregister the bottle and remove its git-gate state from the gateway
     VM. Both steps are idempotent so this is safe from a cleanup trap. Does
     NOT stop the infra VM — it's a persistent per-host singleton shared by
     every bottle."""
-    OrchestratorClient(orchestrator_url).teardown_bottle(bottle_id)
+    from ...orchestrator.config_store import DEFAULT_TEARDOWN_TIMEOUT_SECONDS
+    OrchestratorClient(
+        orchestrator_url,
+        timeout=timeout if timeout is not None else DEFAULT_TEARDOWN_TIMEOUT_SECONDS,
+    ).teardown_bottle(bottle_id)
     deprovision_git_gate(infra_vm.gateway_transport(), bottle_id)
 
 

bot_bottle/backend/firecracker/launch.py

@@ -52,6 +52,7 @@ from ..util import AGENT_CA_BUNDLE, AGENT_CA_PATH
 from . import firecracker_vm, image_builder, isolation_probe, netpool, util
 from .bottle import FirecrackerBottle
 from .bottle_plan import FirecrackerBottlePlan
+from ...orchestrator.config_store import resolve_teardown_timeout
 from .consolidated_launch import (
     launch_consolidated,
     teardown_consolidated,
@@ -121,6 +122,7 @@ def launch(
         stack.callback(
             teardown_consolidated, ctx.bottle_id,
             orchestrator_url=ctx.orchestrator_url,
+            timeout=resolve_teardown_timeout(),
         )
 
         # Step 5: install the SHARED gateway CA (replaces the per-bottle CA).