test(engine): isolate peer abort regression

[jrusso1020]

What

Isolate the engine peer-abort regression test from unrelated production dependency loading.

Why

The test used importOriginal for a large module graph, causing full-matrix timeouts that obscured the cancellation behavior it was meant to protect.

How

Replace the partial importOriginal mock with a complete minimal dependency mock and keep the assertion focused on aborting peer workers after the first fatal classified failure.

Test plan

• Focused peer-abort regression
• Complete Engine suite and non-Producer package matrix

[jrusso1020]

• refactor(repo): resolve changed-code audit #2174
• test(engine): isolate peer abort regression #2173 👈 (View in Graphite)
• refactor(cli): decompose render phases #2172
• refactor(cli): centralize process lifecycle #2171
• fix(cloudrun): publish adapter contract #2170
• test(repo): execute packed subpaths #2169
• refactor(repo): centralize package subpaths #2168
• refactor(core): own edit protocol contract #2167
• test(compiler): enforce preview render parity #2166
• refactor(studio): gate SDK operation families #2165
• refactor(studio): gate Acorn writer migration #2164
• refactor(producer): make capture plans immutable #2163
• refactor(producer): unify render requests #2162
• refactor(engine): type capture failures #2161
• refactor(engine): manage child process lifecycles #2160
• refactor(engine): add fingerprinted browser leases #2159
• refactor(render): centralize execution ownership #2158
• refactor(core): unify composition contract #2157
• fix(studio): enforce optimistic file concurrency #2156
• fix(studio): make sdk cutover transactional #2155
• fix(render): publish artifacts atomically #2154
• fix(render): surface structured outcomes #2153
• fix(player): own connection and media resources #2152
• fix(core): preserve runtime transport contract #2151
• fix(player): version runtime protocol #2150
• test(repo): verify packed consumers #2149
• test(repo): enforce workspace contracts #2148
• fix(core): enforce strict runtime safety #2147
• test(producer): gate source tests by execution lane #2146
• fix(core): make timing masks safe for source loaders #2145
• chore(repo): forbid tracked generated artifacts #2144
• main

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[miguel-heygen]

Approved exact head a03d40e. Audited the complete one-file diff plus every current issue comment, review, REST comment, and GraphQL thread. The minimal frameCapture mock provides all seven runtime imports consumed by parallelCoordinator while leaving classifyCaptureFailure, CaptureFailure, fatality logic, peer cancellation, and cleanup on their production implementations. The regression still deterministically proves the first fatal authoring failure prevents frame capture and closes both sessions. Exact-head required CI and the complete applicable matrix are green. No blocking findings. — Magi