ECDSA JWT parsing uses JWTSecret instead of JWTPublicKey

Bug Description

In internal/token/jwt.go:67, the ParseJWTToken function uses p.config.JWTSecret instead of p.config.JWTPublicKey for ECDSA (ES256/ES384/ES512) token validation.

Signing correctly uses JWTPrivateKey, but parsing incorrectly uses JWTSecret instead of JWTPublicKey.

Impact

CRITICAL — All ECDSA token validation is broken. Tokens signed with ECDSA private key cannot be verified since the wrong key material is used for parsing.

Fix

Change p.config.JWTSecretp.config.JWTPublicKey on line 67 of internal/token/jwt.go.