feat: regenerate API client from OpenAPI spec

[convoy-sdk-bot]

Automated regeneration via OpenAPI Generator (java/native) from docs/v3/openapi3.yaml on frain-dev/convoy main. Hand-written webhook verify (src/main/java/com/getconvoy/webhook/) is untouched by the sync script.

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Note

Medium Risk
Breaking compile-time changes to generated EventsApi return types and model class names; behavior matches the API spec but existing Java integrations must be updated.

Overview
Regenerates the Java client so event create operations (createEndpointEvent, createBroadcastEvent, createDynamicEvent, createEndpointFanoutEvent) deserialize 201 bodies as CreateEndpointEvent201Response with ModelsEventQueuedResponse data (including uid), instead of the previous GetProjects400Response or CreateBroadcastEvent201Response types.

Get and replay (getEndpointEvent, replayEndpointEvent) now return GetEndpointEvent200Response rather than reusing the broadcast create type. Javadoc on create endpoints notes using GET /events/{eventID} or event deliveries to track sends.

Breaking for SDK users: CreateBroadcastEvent201Response is replaced by the new split types; callers should read getData().getUid() from create responses and update imports/return types accordingly.

^{Reviewed by Cursor Bugbot for commit c6069e1. Bugbot is set up for automated code reviews on this repo. Configure here.}

[convoy-sdk-reviewer]

SDK reviewer app: approving a generated-paths-only diff on the regen branch. Auto-merge completes only after required status checks pass.