Caps the size of incoming HTTP POST bodies in both server transports so
an oversized request can no longer exhaust server memory
## How Has This Been Tested?
new tests
## Breaking Changes
binary incompatible for SseServerTransport constuctors
## Types of changes
- [x] Bug fix (non-breaking change which fixes a
- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP Documentation](https:
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
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