Align Day 6 documentation with verified main CI results

[daryal89]

Summary

This pull request aligns the Day 6 documentation with the final
successful GitHub Actions execution on main.

Verified CI Baseline

Metric	Result
CI requests executed	19
Test scripts executed	19
Pre-request scripts executed	2
Assertions executed	45
Assertions passed	45
Assertions failed	0
Runtime errors	0

Complete Validation Baseline

Metric	Result
Requests executed	26
Assertions executed	61
Assertions passed	51
Known assertion failures	10
Runtime errors	0

Documentation Changes

• Correct obsolete 8-request and 22-assertion assumptions
• Document the actual 19-request and 45-assertion CI result
• Add final pull-request evidence
• Add final main workflow evidence
• Add CI coverage mapping
• Update the execution report and executive summary
• Preserve all Day 5 test cases, assertions and confirmed defects

Safety

No Postman collection, environment, GitHub Actions workflow, package,
SQL, spreadsheet or test-case logic was modified.