Add Soroban finding correlation engine

[rohitmulani63-ops]

Closes #486

Summary

• added a Soroban finding correlation engine under src/correlation/stellar
• groups related findings by explicit root cause metadata first, then same file and function signals
• generates a structured report plus markdown output so reviewers can see unified issues clearly

Validation

• npm test -- src/correlation/stellar/soroban-finding-correlation-engine.spec.ts --runInBand
• checked the new files for hidden/bidi/control characters and BOMs

One repo-wide check I tried

• npx tsc -p tsconfig.json --noEmit --pretty false
• this still hits existing repo-wide blockers outside this change, mainly missing Nest/Swagger/TypeORM/React/Vite packages and older strict TypeScript errors in unrelated areas

happy to adjust anything else if needed

[drips-wave]

@rohitmulani63-ops Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits