blockifier_test_utils: add OS resources measurement contract

[dorimedini-starkware]

No description provided.

[reviewable-StarkWare]

This change is 

[dorimedini-starkware]

• blockifier_test_utils: add OS resources measurement contract #14126 : 2 dependent PRs (#14127 , #14128 ) 👈 (View in Graphite)
• blockifier: regenerate VC JSONs #14133
• blockifier: raw VC to_string_pretty #14132
• blockifier: raw VC deterministic map order #14131
• blockifier: raw VC serde equivalence test #14130
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[github-actions]

Artifacts upload workflows:

• Started at 2026-05-24T06:50:41Z
• Started at 2026-05-24T15:40:46Z

[cursor]

PR Summary

Low Risk
Test-only fixture and enum registration in blockifier_test_utils; no production execution or fee logic changes.

Overview
Adds a Cairo 1 account feature contract used to exercise per-syscall OS resource measurement. Its __execute__ path invokes call_contract_syscall against an on-contract empty_function, with standard validate hooks returning VALIDATED.

Registers OsResourcesTest on the existing FeatureContract machinery (mock class hash base 23, name os_resources_test_contract, same Cairo1/CASM/native patterns as other account-style test contracts).

^{Reviewed by Cursor Bugbot for commit 92daa01. Bugbot is set up for automated code reviews on this repo. Configure here.}

[Yoni-Starkware]

@Yoni-Starkware reviewed 2 files and all commit messages, and made 1 comment.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on dorimedini-starkware).

[dorimedini-starkware]

@dorimedini-starkware resolved 1 discussion.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on dorimedini-starkware).

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, have a team admin enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 92daa01. Configure here.}

[dorimedini-starkware]

@dorimedini-starkware made 1 comment and resolved 1 discussion.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on dorimedini-starkware).