Add startup_threshold_seconds to Truss

Author: nnarayen

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "truss"
-version = "0.15.4"
+version = "0.15.5rc001"
 description = "A seamless bridge from model development to model delivery"
 authors = [
     { name = "Pankaj Gupta", email = "no-reply@baseten.co" },

truss/base/truss_config.py

@@ -546,6 +546,7 @@ class HealthChecks(custom_types.ConfigModel):
     restart_check_delay_seconds: Optional[int] = None
     restart_threshold_seconds: Optional[int] = None
     stop_traffic_threshold_seconds: Optional[int] = None
+    startup_threshold_seconds: Optional[int] = None
 
 
 class TransportKind(str, enum.Enum):