Feat/multi 327 326 325 324

[Feyisara2108]

Summary of Changes

• [Database & Migrations] Enhance and optimize Invoice.model.ts (Issue #64) #327 (Issue Add unit tests for the validateInvoiceForPublish helper returning all errors simultaneously for a fully invalid invoice #64): Refactored src/models/Invoice.model.ts with composite indexing, Decimal lifecycle calculation hooks, input sanitization, and batch execution logging.
• [Database & Migrations] Enhance and optimize Transaction.model.ts (Issue #63) #326 (Issue Add integration test for notification endpoint delivering correct message to investor after invoice is funded #63): Hardened src/models/Transaction.model.ts with composite indexing, scale-4 amount formatting, uppercase Stellar transaction hash normalization, status helpers (markCompleted, markFailed), and batch processing error handling.
• [Database & Migrations] Enhance and optimize 1731513600000-InitialSchema.ts (Issue #62) #325 (Issue Add structured log for settlement flow completion recording total proceeds and investor count #62): Refactored src/migrations/1731513600000-InitialSchema.ts schema DDL with try/catch query runner error handling, logging, and performance composite indexes across invoices, transactions, and investments.
• [Database & Migrations] Enhance and optimize Invoice.model.ts (Issue #61) #324 (Issue Add integration test for marketplace listing endpoint returning invoices sorted by face value descending by default #61): Extended src/models/Invoice.model.ts with status predicate helper methods (isExpired, isPublishable, isFundable, isSettlable, canBeCancelled, canBeRejected) and batchUpdateStatus helper with error handling.

Closes #327
Closes #326
Closes #325
Closes #324

[drips-wave]

@Feyisara2108 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