fix: Loosen StoreListActor.picture_url to str and add new API error type

[apify-service-account]

Regenerates the Pydantic models, TypedDicts, and literal aliases from the published OpenAPI specification (v2-2026-08-24T085852Z -> v2-2026-08-27T071624Z), picking up the spec fixes from apify/apify-docs#2859.

• StoreListActor.picture_url is now str | None instead of AnyUrl | None. The API doesn't guarantee an RFC 3986 URI here - legacy Actors can carry an empty or malformed pictureUrl - so such Store items no longer fail validation.
• ErrorType gains cannot-publish-actor-task, returned with 400 by POST /v2/actor-tasks and PUT /v2/actor-tasks/{actorTaskId}.
• ActorNotice gains a NONE_TYPE_NONE = None member. The spec now lists null in the enum (the API does return notice: null); since the field is typed ActorNotice | None, None still validates to plain None, so this is cosmetic.

✍️ Drafted by Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.29%. Comparing base (79e205b) to head (54f9c68).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1038      +/-   ##
==========================================
+ Coverage   95.27%   95.29%   +0.01%     
==========================================
  Files          59       59              
  Lines        5501     5502       +1     
==========================================
+ Hits         5241     5243       +2     
+ Misses        260      259       -1     

Flag	Coverage Δ
integration	92.42% <100.00%> (+0.16%)	⬆️
unit	87.36% <100.00%> (+<0.01%)	⬆️

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