[alihesari]

What changed

• HttpClient.request/post accept per-request headers (needed for Idempotency-Key).
• ads.upload_conversions takes an optional idempotency_key and now returns ConversionUploadResult (id, accepted, event_count, replayed) instead of a dict. Noted under Changed in the changelog.
• New ads.send_conversions(..., idempotency_key=...) for POST /v1/ads/conversions/events. Named send_conversions because ads.send_conversion_events(rule_id, ...) already exists for LinkedIn conversion rules and renaming it would break callers.
• ads.conversion_batches, pixels (pixels, create_pixel, get_pixel, update_pixel, share_pixel, pixel_stats, event_match_quality) and custom conversions (custom_conversions, create_custom_conversion, get_custom_conversion, update_custom_conversion, delete_custom_conversion).
• Models and enum tuples exported from fopost. README table and CHANGELOG (Unreleased) updated.

Tests

uv run ruff check . && uv run ruff format --check . && uv run mypy && uv run pytest: all pass, 213 tests. New tests/test_ads_tracking.py covers the idempotent send (header sent, replay parsed), a pixel read, and a custom conversion create.

Owed

• No version bump, no tag (releases are batched).
• fopost-django and fopost-fastapi only pin fopost>=0.1,<1.0 and do not touch ads, so no downstream PR.