fix: Drop TypeMapper from exception and security paths#85
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Mirror PR #76's approach (HealthRenderer) for the problem+json wire shape. The default exception handler and SecurityFilter no longer route ProblemDetail through a TypeMapper; a hand-rolled ProblemDetailRenderer writes the fixed RFC 7807 shape directly, so the library emits problem responses without a JSON library on the classpath and without record-accessor reflection that GraalVM Native Image would otherwise need configured. Also replace the reflective GsonJsonMapper newInstance with a direct constructor call, still gated by the existing Class.forName Gson-presence probe. Drops the matching reflect-config entry for the constructor. Extract the shared JSON string-escape into internal/JsonStrings, used by both HealthRenderer and ProblemDetailRenderer. BREAKING CHANGE: Handlers.defaultExceptionHandler(TypeMapper) becomes defaultExceptionHandler(). SecurityFilter constructor drops its TypeMapper parameter.
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Mirror PR #76's approach (HealthRenderer) for the problem+json wire shape. The default exception handler and SecurityFilter no longer route ProblemDetail through a TypeMapper; a hand-rolled ProblemDetailRenderer writes the fixed RFC 7807 shape directly, so the library emits problem responses without a JSON library on the classpath and without record-accessor reflection that GraalVM Native Image would otherwise need configured.
Also replace the reflective GsonJsonMapper newInstance with a direct constructor call, still gated by the existing Class.forName Gson-presence probe. Drops the matching reflect-config entry for the constructor.
Extract the shared JSON string-escape into internal/JsonStrings, used by both HealthRenderer and ProblemDetailRenderer.
BREAKING CHANGE: Handlers.defaultExceptionHandler(TypeMapper) becomes defaultExceptionHandler(). SecurityFilter constructor drops its TypeMapper parameter.