[MODINVOICE-657] Resolve issues with dependantbot upgrades

[ykashtalian]

Purpose

MODINVOICE-657 - Resolve issues with dependantbot upgrades

Approach

One API fix caused by a breaking change in Vert.x 5.1.x. HeadersMultiMap.httpHeaders() replaced with the public API MultiMap.caseInsensitiveMultiMap()

Related PR

Dependabot PR that caused the failures - #630

Pre-Review Checklist

• Self-reviewed Code — Reviewed code for issues, unnecessary parts, and overall quality.
• Change Notes — NEWS.md updated with clear description and issue key.
• Testing — Confirmed changes were tested locally or on dev environment.
• Logging: Confirmed that logging is appropriately handled.
• Breaking Changes — Handled all required actions if changes affect API, DB, or interface versions.
  • API/schema changes
  • Interface version updates
  • DB schema changes / migration scripts
• New Properties / Environment Variables — Updated README.md if new configs were added.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud