[alihesari]

What changed

• ads().sendPixelConversions(params, idempotencyKey): the idempotent Conversions API send at POST /v1/ads/conversions/events, key sent as the Idempotency-Key header (required, blank throws). ads().listConversionBatches(workspaceId, connectionId, limit) reads GET /v1/ads/conversions/events.
• ads().uploadConversions now returns ConversionUploadResult (id, accepted, eventCount, replayed) instead of a bare count, and has an overload taking an optional idempotency key. Existing callers reading the count switch to .accepted().
• Pixels: pixels, createPixel, pixel, updatePixel, sharePixel, pixelStats, eventMatchQuality with AdPixel, AdPixelDetail, AdPixelStats, EventMatchQuality records.
• Custom conversions: customConversions, createCustomConversion, customConversion, updateCustomConversion, deleteCustomConversion with CustomConversion / CustomConversionRule and CreateCustomConversionParams / UpdateCustomConversionParams.
• ApiClient.request gains an overload with extra headers (internal), which is how the idempotency header is sent.
• README section "Tracking" and an Unreleased CHANGELOG entry. No version bump, no tag.

Tests

mvn -B verify: BUILD SUCCESS, 177 tests, 0 failures, warning-free. New AdsTrackingTest covers the header on the idempotent send (and its absence on the plain upload), the batch list filters, a pixel read, match quality and a custom conversion create plus delete-with-body.

Owed

• fopost-spring does not reference uploadConversions, so no lockstep PR was needed; its dependency bump happens at release.
• Release is batched by Ali.