starknet_os_flow_tests: fuzz test emit event scenario

[dorimedini-starkware]

Note

Low Risk
Low risk: changes are confined to test contracts and flow-test harness, adding event emission coverage and expected-event assertions without altering production execution logic.

Overview
Adds a new fuzzing operation/scenario to emit Starknet events during the revert-fuzz flow (Cairo0 and Cairo1), including corresponding FuzzEvent definitions and an EmitEvent branch in the scenario dispatcher.

Updates the OS flow fuzz test harness to generate event operations, track emitted event payloads per call frame, and assert expected events by passing per-tx EventPredicateExpectations into TestBuilder::add_invoke_tx. Regenerates the Cairo0 compiled artifact (fuzz_revert_compiled.json) to include the new event ABI/syscall.

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[reviewable-StarkWare]

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[Yoni-Starkware]

@Yoni-Starkware reviewed 6 files and all commit messages, and made 1 comment.
Reviewable status: 6 of 10 files reviewed, all discussions resolved (waiting on dorimedini-starkware).

[dorimedini-starkware]

@dorimedini-starkware reviewed 10 files and all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on dorimedini-starkware).

[graphite-app]

Merge activity

• Apr 5, 8:13 AM UTC: Graphite rebased this pull request, because this pull request is set to merge when ready.