ci: optimize cognitive-shader-driver in member-tests (debug stays 0)

[AdaWorldAPI]

member-tests was cancelled at its 30-minute limit, both on main (run 37766947128) and on #1410. In both runs it was cut off in the hydrate step, after every earlier step had passed.

Cause (measured from the job log)

The time does not come from compiling, and not from debug info: RUSTFLAGS -C debuginfo=0 and [profile.dev] debug = 0 are already set. It comes from one test binary. The unit tests of the crossword_real_words_probe example (D-PUZZLE-0, added 2026-10-07) run a solver search that took 810 s at opt-level 0:

• every_question_counts_the_same_three_ways
• instances_are_unique_and_givens_are_needed
• nyt_lane_holds_one_claim_per_slot_of_its_own_grid

Fix

The shader-driver step now runs with:

--config 'profile.dev.package.cognitive-shader-driver.opt-level=3'

• Only this one package is compiled with optimization.
• Debug info stays 0, from the manifest.
• All other crates keep the shared opt-level-0 cache.
• No change to Cargo.toml, so local dev builds are unaffected.
• No test is skipped or marked #[ignore].

Local measurement (CARGO_PROFILE_DEV_DEBUG=0)

	before	after
crossword_real_words_probe tests	810 s (CI log)	184 s
whole shader-driver step	~15 min (CI)	4m17 including the compile, all green

The "before" figure is from the CI run and the "after" figure is local, so they come from different machines.

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Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-08T17:38:20.666600Z	7aeb258	Draft marked ready

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