Sunflower (2025 R1) release.
- RMB-1010: PostgreSQLContainer withStartupAttempts(3)
- RMB-1011: Timeout when trying to connect to DB_HOST:DB_PORT
- RMB-1013: make helper functions public in PgUtil class
- RMB-1021: Upgrade Java from 17 to 21
- RMB-1022, RMB-1014: Vert.x 4.5.13, other dep upgrades for Sunflower
