Split canopy regression matrix into independent tests

[Aymericr]

The exhaustive canopy rendering regression covered 240 geometry combinations inside one test with a shared 15-second deadline. Two consecutive private-editor main CI attempts timed out at 15,141.06 ms and 15,387.96 ms, even though the same test passed required PR CI at 13,029.10 ms.

This registers each existing form/angle/turn/reverse/projection-flip combination as an independently named test. Every case keeps the same scene construction, overlap calculation, geometry disposal, and zero-overlap requirement. The change does not raise a timeout, remove cases, weaken assertions, or claim faster runtime.

Validation:

• CI-matching Bun 1.3.14: three focused runs, 250/250 passing each
• Exact matrix check: 240 expected unique cases, zero missing/extra/duplicate
• Full @pascal-app/nodes suite: 2,336 passed, 1 existing skip
• Repository Biome check: 2,086 files passed
• git diff --check: passed

Local timing cannot reproduce GitHub runner load; the fix addresses reliability by removing the shared matrix deadline.

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Note

Low Risk
Test-only refactor with identical assertions and coverage; no production code paths change.

Overview
Replaces one 240-case canopy roof overlap regression with 240 individually named test() entries in canopy-rendering-regression.test.ts, so each form/angle/turn/reverse/projection-flip combination runs under its own test instead of a single nested loop.

Behavior is unchanged: same buildRuns setup, separatedTopOverlapCount, geometry disposal, and expect(overlaps).toBe(0). The aggregate failures array and the 15s timeout on the monolithic test are removed in favor of per-case failures and default per-test timeouts, addressing CI flakiness from the shared deadline on a heavy matrix.

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[pascal]

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