fix(go): response-stream zero values, float literals, baseURL collision, union variable collision; fix(python): per-request timeout_ms override; fix(typescript): file uploads in bundled environments; fix(ruby): attr_accessor formatting, reserved keyword shadowing

[AshGodfrey]

Go

• Return nil for response-stream zero values instead of emitting invalid composite literal
• Normalize float literals in usage examples to always render valid Go syntax
• Reserve baseURL as SDK keyword to prevent identifier collisions
• Avoid data variable collision in union UnmarshalJSON by renaming to dataVal

Python

• Ensure per-request timeout_ms override is respected instead of silently disabling timeouts

TypeScript

• Resolve 422 errors on file uploads in bundled environments (Next.js/webpack) by using duck-typing instead of instanceof Blob and passing filename in isBlobLike path

Ruby

• Add missing empty line after attr_accessor in sub-SDK service classes to fix RuboCop violation
• Reserve key and value as method argument keywords to prevent ShadowingOuterLocalVariable offense