Configurable SSE buffer sizes

[christianhelle]

Changes back ported from puny's lmstudio.zig

Improvements

• stringifyStreamRequest: Replaced JSON parse→modify→re-serialize with safe string concatenation. Avoids arena allocation and double serialization.
• Configurable SSE buffer sizes: Added --sse-buffer <mode> CLI flag with small (8KB line / 64KB event, default) and large (256KB line / 1MB event) modes.

Files changed

File	Change
src/cli.zig	SseBufferMode enum, --sse-buffer arg parsing
src/generators/unified/api_generator.zig	stringifyStreamRequest (string concat), dynamic SSE constants
README.md	Added --sse-buffer docs
docs/index.html	Added --sse-buffer docs
generated/*.zig	Regenerated with new defaults

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ec9fa3cc-d5af-481d-b745-96f775c89084

📥 Commits

Reviewing files that changed from the base of the PR and between ae1d8e0 and c07cfdc.

⛔ Files ignored due to path filters (10)

• generated/anthropic.zig is excluded by !**/generated/**
• generated/compile_generated.zig is excluded by !**/generated/**
• generated/generated_v2.zig is excluded by !**/generated/**
• generated/generated_v2_yaml.zig is excluded by !**/generated/**
• generated/generated_v3.zig is excluded by !**/generated/**
• generated/generated_v31.zig is excluded by !**/generated/**
• generated/generated_v31_yaml.zig is excluded by !**/generated/**
• generated/generated_v32.zig is excluded by !**/generated/**
• generated/generated_v3_yaml.zig is excluded by !**/generated/**
• generated/lmstudio.zig is excluded by !**/generated/**

📒 Files selected for processing (4)

• README.md
• docs/index.html
• src/cli.zig
• src/generators/unified/api_generator.zig

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch configurable-sse-buffer-sizes

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