Return the prompt hash in upload responses (#44325)

## What changed

Add nullable `promptHash` to the upload response, populated from the uploaded `prompt_hash` tag. It identifies the whitespace-normalized SHA-256 of the session base instructions, excludes later developer messages, and is `null` when the reported rollout has no prompt metadata.

Update the protocol schemas, precomputed exports, and generated TypeScript and Python types.

GitOrigin-RevId: 6fa70fbe7a06604ac1cd0ea363eb4f192083dad9

sdk/python/src/openai_codex/generated/v2_all.py

@@ -1442,6 +1442,13 @@ class FeedbackUploadResponse(BaseModel):
     model_config = ConfigDict(
         populate_by_name=True,
     )
+    prompt_hash: Annotated[
+        str | None,
+        Field(
+            alias="promptHash",
+            description="Whitespace-normalized SHA-256 of the session base instructions, matching the uploaded `prompt_hash` tag. Does not include later developer messages. Null when the reported rollout has no prompt metadata.",
+        ),
+    ] = None
     thread_id: Annotated[str, Field(alias="threadId")]