fix(codegen): disable datamodel-codegen timestamp header

Without --disable-timestamp, every regen writes the current wall-clock
time into the generated file's header, causing spec-check CI to
open a PR on every run with a one-line timestamp-only diff.

Also refreshes the regenerated file (one-line header removal) and
picks up the already-published 0.5.0 version in uv.lock.

Author: caballeto

scripts/typegen.sh

@@ -55,7 +55,8 @@ uv run datamodel-codegen \
   --enum-field-as-literal one \
   --use-one-literal-as-default \
   --input-file-type openapi \
-  --formatters ruff-format
+  --formatters ruff-format \
+  --disable-timestamp
 
 # Why --enum-field-as-literal=one + --use-one-literal-as-default?
 #

src/devhelm/_generated.py

@@ -1,6 +1,5 @@
 # generated by datamodel-codegen:
 #   filename:  .openapi-preprocessed.json
-#   timestamp: 2026-04-29T17:00:31+00:00
 
 from __future__ import annotations
 from typing import Annotated, Any, Literal