fix: enable es256 jwt signing algorithm support for gotrue

[7ttp]

bug fix

gotrue rejects es256 signed jwts with "signing method es256 is invalid" error despite proper signing key configuration in config.toml. the issue occurs because gotrue defaults to only accepting hs256 tokens without explicit algorithm configuration.

gotrue now receives gotrue_jwt_valid_methods environment variable during startup with all configured signing algorithms (hs256, rs256, es256). the fix detects algorithms from signing keys configuration and automatically includes them in the valid methods list. hs256 is always included for backward compatibility.

resolves #4488

[coveralls]

Pull Request Test Coverage Report for Build 19627464325

Details

• 0 of 2 (0.0%) changed or added relevant lines in 1 file are covered.
• 6 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.03%) to 55.06%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/start/start.go	0	2	0.0%

Files with Coverage Reduction	New Missed Lines	%
internal/start/start.go	1	65.39%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 19626009298:	-0.03%
Covered Lines:	6540
Relevant Lines:	11878

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💛 - Coveralls