fix(types): satisfy pyright strict on the refactored facades

Two facade issues from the reorg:

  * orchestrator/__init__.py used `__all__ = list(_LAZY)`, which pyright
    strict can't analyze (reportUnsupportedDunderAll) — and because it
    isn't a static literal, the TYPE_CHECKING re-export imports read as
    unused. Replaced with the explicit literal list the other lazy
    facades already use.
  * manifest/index.py imported six piece types (ManifestAgentProvider,
    EGRESS_AUTH_SCHEMES, ManifestEgressConfig/Route, ManifestGitEntry,
    ManifestKeyConfig) it never referenced — the package facade re-exports
    those straight from their submodules, so index.py needn't import them.
    Dropped the dead imports.

pyright: 0 errors (was 24). Full unit suite green (2243).

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

bot_bottle/manifest/index.py

@@ -16,15 +16,10 @@ from typing import Mapping
 
 from ..log import warn
 from .util import ManifestError, as_json_object
-from .agent import ManifestAgent, ManifestAgentProvider
+from .agent import ManifestAgent
 from .bottle import ManifestBottle
-from .egress import (
-    EGRESS_AUTH_SCHEMES,
-    ManifestEgressConfig,
-    ManifestEgressRoute,
-)
 from .extends import merge_bottles_runtime, resolve_bottles
-from .git import ManifestGitEntry, ManifestGitUser, ManifestKeyConfig
+from .git import ManifestGitUser
 from .loader import (
     check_stale_json,
     load_bottle_chain_from_dir,