Ratchet Native AOT publish diagnostics

[nickna]

Summary

• capture the real Native AOT publish log and parse post-link IL diagnostics that the SDK analyzer job cannot see
• establish the green linux-x64 inventory at 72 lines: 56 SharpTS-owned and 16 framework/dependency diagnostics
• exact-match SharpTS warning codes, subjects, and counts while reporting external drift without failing on 10.0.x servicing changes
• upload the publish log and structured summary from every Native CI run
• document the bounded 47-warning AST catalog tranche and nine-warning follow-up tranche

Validation

• replayed the parser against green Linux Native job 30601656765: 72 total / 56 project / 16 external, exact baseline match
• fresh win-arm64 Native publish: 74 total / 56 project / 18 external; project baseline passed and the two Windows-only framework summaries were informational
• deliberately changed project total from 56 to 55: enforcement rejected the mismatch
• PowerShell syntax parser: clean
• dotnet build SharpTS.csproj --configuration Release --no-restore: 0 warnings, 0 errors
• win-arm64 Native image remains 93,376,000 bytes