feat(devbox): add provisioning_tier to LaunchParameters (alpha)

Adds the optional provisioning_tier field ("standard" | "flex") to the
LaunchParameters request (shared_params) and response (shared) models,
matching the field now exposed in the OpenAPI spec.

Hand-applied ahead of the next Stainless regeneration so the alpha customer
can use the field immediately. provisioning_tier is intentionally kept out of
the public docs (stripped from the documented spec upstream).

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

Author: claude

src/runloop_api_client/types/shared/launch_parameters.py

@@ -74,6 +74,9 @@ class LaunchParameters(BaseModel):
     will inherit this policy unless explicitly overridden.
     """
 
+    provisioning_tier: Optional[Literal["standard", "flex"]] = None
+    """(Optional) standard is default and flex is lazily provisioned and may be pre-empted."""
+
     required_services: Optional[List[str]] = None
     """A list of ContainerizedService names to be started when a Devbox is created.
 

src/runloop_api_client/types/shared_params/launch_parameters.py

@@ -76,6 +76,9 @@ class LaunchParameters(TypedDict, total=False):
     will inherit this policy unless explicitly overridden.
     """
 
+    provisioning_tier: Optional[Literal["standard", "flex"]]
+    """(Optional) standard is default and flex is lazily provisioned and may be pre-empted."""
+
     required_services: Optional[SequenceNotStr[str]]
     """A list of ContainerizedService names to be started when a Devbox is created.