fix(openapi-generator): preserve response representations per status

[craigsmitham]

Summary

• preserve multiple JSON-compatible response representations on one status
• decode common and schema-declared binary success responses in regular generated methods
• keep type-only decoder arguments aligned when binary and JSON operations share a client
• retain the companion streaming method for binary responses

Closes #6368.
Closes #6372.
Closes #6374.

Validation

• pnpm test packages/tools/openapi-generator/test/OpenApiGenerator.test.ts
• pnpm lint-fix
• pnpm check

[changeset-bot]

🦋 Changeset detected

Latest commit: 27f012b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 27 packages

Name	Type
@effect/openapi-generator	Patch
effect	Patch
@effect/opentelemetry	Patch
@effect/platform-browser	Patch
@effect/platform-bun	Patch
@effect/platform-node-shared	Patch
@effect/platform-node	Patch
@effect/vitest	Patch
@effect/ai-anthropic	Patch
@effect/ai-openai-compat	Patch
@effect/ai-openai	Patch
@effect/ai-openrouter	Patch
@effect/atom-react	Patch
@effect/atom-solid	Patch
@effect/atom-vue	Patch
@effect/sql-clickhouse	Patch
@effect/sql-d1	Patch
@effect/sql-libsql	Patch
@effect/sql-mssql	Patch
@effect/sql-mysql2	Patch
@effect/sql-pg	Patch
@effect/sql-pglite	Patch
@effect/sql-sqlite-bun	Patch
@effect/sql-sqlite-do	Patch
@effect/sql-sqlite-node	Patch
@effect/sql-sqlite-react-native	Patch
@effect/sql-sqlite-wasm	Patch

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