Add 1-byte segment transmit tests for each existing HTTP parser test

[Copilot]

Pull Request

Description

For each existing test in test/unit/http-parser/test-parser-requests.cpp, adds a companion test that feeds the same HTTP request data to appendBuffer one byte at a time instead of all at once.

• What does this PR do? Adds 5 new BOOST_AUTO_TEST_CASE entries, one paired after each existing test, replacing the single appendBuffer call with a loop of parser->appendBuffer(str.c_str() + i, 1) calls.
• Why is it necessary? Validates that the HTTP parser handles byte-by-byte streaming input correctly, in addition to full-buffer transmit.

New tests added:

• test_single_valid_get_request_1byte_segment_transmit
• test_single_post_request_1byte_segment_transmit
• test_multiple_valid_get_request_1byte_segment_transmit
• test_multiple_valid_get_and_post_requests_1byte_segment_transmit
• test_single_valid_post_request_partial_1byte_segment_transmit

Related Issue

N/A

Type of Change

• Test improvement

Checklist

• I have read the contributing guidelines
• I have performed a self-review of my code
• I have added tests that prove my fix is effective or my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published

Additional Notes

The new tests mirror the existing ones exactly in terms of assertions — only the appendBuffer call pattern differs (1 byte at a time via a for loop).

[clauspruefer]

@copilot: WTF are you doing? i will not pay for this crap.