chore: regenerate types to sync with CI

Regenerate types to match what CI generates. Only timestamp changed.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: bokelley

src/adcp/types/_generated.py

@@ -10,7 +10,7 @@
 DO NOT EDIT MANUALLY.
 
 Generated from: https://github.com/adcontextprotocol/adcp/tree/main/schemas
-Generation date: 2025-11-18 11:52:11 UTC
+Generation date: 2025-11-18 12:11:55 UTC
 """
 # ruff: noqa: E501, I001
 from __future__ import annotations

src/adcp/types/generated_poc/list_creatives_request.py

@@ -1,6 +1,6 @@
 # generated by datamodel-codegen:
 #   filename:  list-creatives-request.json
-#   timestamp: 2025-11-18T03:35:10+00:00
+#   timestamp: 2025-11-18T12:11:55+00:00
 
 from __future__ import annotations