fix: forward idempotency_key, ignore_ssl_errors and do_not_retry for ad-hoc webhooks

[vdusek]

Description

Ad-hoc webhooks passed to start() / call() silently dropped idempotency_key, ignore_ssl_errors and do_not_retry. WebhookRepresentation declared only the four templating fields, and encode_webhooks_to_base64 keeps only declared fields, so these three never reached the platform. The platform accepts and honors all three for ad-hoc webhooks (verified in apify-core: the run-start handler feeds them into the same webhook-creation path as the create-webhook endpoint, including the idempotencyKey dedup).

What changed:

• Adds the three fields to WebhookRepresentation and both webhook-representation typed dicts (snake_case + camelCase).
• Reworks the WebhookCreate / dict projection in encode_webhooks_to_base64 to filter by the fields WebhookRepresentation declares, instead of hand-listing them. New ad-hoc fields now flow through automatically, so this class of silent-drop bug cannot recur.

This PR updates the auto-generated Pydantic models and TypedDicts based on OpenAPI specification changes in apify-docs PR #2640.

Supersedes #855 (the auto-regeneration of the same model changes).

Unblocks apify/apify-sdk-python#963, which forwards these fields from the SDK Webhook dataclass.

[codecov]

Codecov Report

❌ Patch coverage is 43.47826% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.58%. Comparing base (9a953c7) to head (43ae378).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
src/apify_client/_typeddicts.py	0.00%	12 Missing ⚠️
src/apify_client/_utils.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #854      +/-   ##
==========================================
- Coverage   94.82%   94.58%   -0.24%     
==========================================
  Files          48       48              
  Lines        5045     5063      +18     
==========================================
+ Hits         4784     4789       +5     
- Misses        261      274      +13     

Flag	Coverage Δ
integration	92.73% <26.08%> (-0.47%)	⬇️
unit	83.33% <43.47%> (-0.20%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.