refactor(backend): rename consolidated_launch -> infra_launch (0081 review)

Mechanical rename addressing review 6141 on #519: "consolidated launch" was
unclear about what it composes. Rename the per-backend module
`consolidated_launch.py` -> `infra_launch.py` and the error
`ConsolidatedLaunchError` -> `InfraLaunchError` across all three backends and
their callers/tests. Unify the three identical per-backend error classes into
one `InfraLaunchError` defined in `backend/base.py` (re-exported by each
`infra_launch`) so the base backend can raise and catch a single shared type —
groundwork for the base owning the gateway-attach flow.

Add a glossary entry defining **infra** = the per-host gateway + orchestrator
service pair every bottle attaches to.

No behavior change.

Refs #516, #519.

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

bot_bottle/backend/firecracker/backend.py

@@ -120,7 +120,7 @@ class FirecrackerBottleBackend(
         return _enumerate.enumerate_active()
 
     def attach_bottled_agents_to_gateway(self) -> None:
-        from .consolidated_launch import attach_bottled_agents_to_gateway
+        from .infra_launch import attach_bottled_agents_to_gateway
         attach_bottled_agents_to_gateway()
 
     def supervise_mcp_url(self, plan: FirecrackerBottlePlan) -> str:

bot_bottle/backend/firecracker/infra_launch.py

@@ -41,6 +41,7 @@ from ...orchestrator.lifecycle import (
 )
 from ...orchestrator.reprovision import reprovision_bottles
 from ...orchestrator.store.secret_store import ENV_VAR_SECRET_NAME
+from ..base import InfraLaunchError
 from ..provision_bottle import deprovision_bottle, provision_bottle
 from ..util import AGENT_CA_PATH
 from . import cleanup, util
@@ -50,10 +51,6 @@ from .infra import FirecrackerInfraService
 _ENV_VAR_SECRET_PATH = "/run/bot-bottle/env-var-secret"
 
 
-class ConsolidatedLaunchError(RuntimeError):
-    """The consolidated register/provision sequence could not complete."""
-
-
 @dataclass(frozen=True)
 class LaunchContext:
     """What the Firecracker launch needs from the consolidated sequence."""
@@ -85,7 +82,7 @@ def persist_env_var_secret(private_key: Path, guest_ip: str, secret: str) -> Non
         input=secret, capture_output=True, text=True, check=False,
     )
     if proc.returncode != 0:
-        raise ConsolidatedLaunchError(
+        raise InfraLaunchError(
             f"failed to persist {ENV_VAR_SECRET_NAME} in agent VM: "
             f"{proc.stderr.strip() or '<no stderr>'}"
         )
@@ -95,7 +92,7 @@ def _push_gateway_ca_to_agent(private_key: Path, guest_ip: str, ca_pem: str) ->
     """Replace one running agent VM's trusted gateway CA with `ca_pem` and
     rebuild its trust store over SSH. Unconditional install — there is one
     gateway, so no fingerprint match is needed. Bare-pipe input keeps the cert
-    off argv. Raises `ConsolidatedLaunchError` on failure."""
+    off argv. Raises `InfraLaunchError` on failure."""
     install = (
         "umask 022; mkdir -p /usr/local/share/ca-certificates && "
         f"cat > {AGENT_CA_PATH} && chmod 644 {AGENT_CA_PATH} && "
@@ -106,7 +103,7 @@ def _push_gateway_ca_to_agent(private_key: Path, guest_ip: str, ca_pem: str) ->
         input=ca_pem, capture_output=True, text=True, check=False,
     )
     if proc.returncode != 0:
-        raise ConsolidatedLaunchError(
+        raise InfraLaunchError(
             f"CA push to {guest_ip} failed: "
             f"{proc.stderr.strip() or '<no stderr>'}"
         )
@@ -135,7 +132,7 @@ def attach_bottled_agents_to_gateway() -> None:
         try:
             _push_gateway_ca_to_agent(private_key, guest_ip, ca_pem)
             reconciled += 1
-        except (OSError, ConsolidatedLaunchError) as exc:
+        except (OSError, InfraLaunchError) as exc:
             info(f"CA reconcile skipped for {guest_ip}: {exc}")
     if reconciled:
         info(f"reconciled gateway CA into {reconciled} running Firecracker bottle(s)")
@@ -215,6 +212,6 @@ __all__ = [
     "launch_consolidated",
     "attach_bottled_agents_to_gateway",
     "deprovision_consolidated",
-    "ConsolidatedLaunchError",
+    "InfraLaunchError",
     "OrchestratorStartError",
 ]

bot_bottle/backend/firecracker/launch.py

@@ -51,7 +51,7 @@ from .bottle import FirecrackerBottle
 from .bottle_plan import FirecrackerBottlePlan
 from ...orchestrator.store.config_store import resolve_teardown_timeout
 from ...orchestrator.store.secret_store import ENV_VAR_SECRET_NAME
-from .consolidated_launch import (
+from .infra_launch import (
     launch_consolidated,
     persist_env_var_secret,
     deprovision_consolidated,