chore: bump version to 2.5.5 [skip release]

Author: github-actions[bot]

api/__init__.py

@@ -51,7 +51,7 @@ async def get_response(self, path: str, scope: Scope) -> Any:
 # Single source of truth for the lux-mon version. The footer reads this via
 # /api/version, and FastAPI's version field derives from it. bump-version.sh
 # updates this one constant.
-LUXMON_VERSION = "2.5.4"
+LUXMON_VERSION = "2.5.5"
 
 app = FastAPI(title="lux-mon API", version=LUXMON_VERSION)