Hash fixture passwords at minimum bcrypt cost

[cattekin]

Fixtures call BCrypt directly, bypassing Rails test configuration.

Switching to MIN_COST significantly reduces test run time:

before

Finished in 4.501719s, 90.4099 runs/s, 303.4396 assertions/s.
407 runs, 1366 assertions, 0 failures, 0 errors, 1 skips

after

Finished in 1.068829s, 380.7906 runs/s, 1278.0342 assertions/s.
407 runs, 1366 assertions, 0 failures, 0 errors, 1 skips

[claude]

Claude Code Review

This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

[Copilot]

Copilot review overview

🟢 Approved

The focused change is valid, consistent with existing development setup, and introduces no unresolved issues.

Review effort: Balanced
Findings: None

What changed in this PR

Uses bcrypt’s minimum cost for fixture passwords, significantly speeding up test setup while preserving authentication behavior.

Changes:

• Configures fixture password hashing with BCrypt::Engine::MIN_COST.

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File	Description
test/​fixtures/​users.yml	Reduces bcrypt cost for test fixture password generation.

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