fix: remove volatile metadata from generated models header

Disable timestamp and filename in the datamodel-codegen header so that
regenerating from an unchanged OpenAPI spec produces identical output,
preventing spurious PRs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: vdusek

pyproject.toml

@@ -226,6 +226,8 @@ extra_fields = "allow"
 allow_population_by_field_name = true
 aliases = "datamodel_codegen_aliases.json"
 formatters = ["ruff-check", "ruff-format"]
+custom_file_header = "# generated by datamodel-codegen"
+disable_timestamp = true
 
 [tool.uv]
 # Minimal defense against supply-chain atatcks.

src/apify_client/_models.py

@@ -1,6 +1,4 @@
-# generated by datamodel-codegen:
-#   filename:  https://docs.apify.com/api/openapi.json
-#   timestamp: 2026-04-09T08:30:29+00:00
+# generated by datamodel-codegen
 
 from __future__ import annotations