Summary

This PR adds four enhancements to the SSE client that improve flexibility while maintaining backward compatibility:

• POST/PUT request support: Enables HTTP methods beyond GET with optional JSON payload support
• Proxy authentication fix: Corrects proxy parameter names to use proxy_username/proxy_password instead of proxy_user/proxy_pass
• Optional parsing mode: Adds ability to bypass SSE parsing for raw data streaming use cases
• Optional SSL verification override: Allows disabling SSL verification for development/testing (secure by default)

Changes

POST/PUT Request Support

• Added http_method parameter (defaults to "GET")
• Added http_payload parameter for JSON payloads
• Updated request logic to use specified method and payload

Proxy Authentication Fix

• Fixed proxy option parameter names to match expected format
• Changed from proxy_user/proxy_pass to proxy_username/proxy_password

Optional Parsing Mode

• Added parse parameter (defaults to true)
• When disabled, bypasses SSE parsing and returns raw chunks as events
• Implemented via new BasicEventParser class

SSL Verification Override

• Added verify_ssl parameter (defaults to true for security)
• When set to false, disables SSL certificate verification
• Useful for development, testing, and internal networks with self-signed certificates

Test plan

• All existing tests pass
• Backward compatibility maintained (all defaults preserve existing behavior)
• Security maintained by default (SSL verification enabled unless explicitly disabled)
• New features tested with existing test suite

Compatibility

All changes are backward compatible - existing code will continue to work exactly as before since all new parameters have sensible defaults that maintain current behavior and security posture.