🛡️ Sentinel: [CRITICAL] Fix JPQL injection in RoomChangeController

[ManupaKDU]

🚨 Severity: CRITICAL
💡 Vulnerability: JPQL Injection via un-sanitized user input concatenation in RoomChangeController.getSelectedItems().
🎯 Impact: Malicious users could bypass search logic, extract unauthorized patient admission data, or inject malicious SQL commands.
🔧 Fix: Replaced direct string concatenation with parameterized query map using findByJpql(). Wrapped the OR statements in grouping parentheses to correctly mimic the intent and used upper() to maintain case-insensitive search logic.
✅ Verification: Tested locally via manual code compilation (offline mode due to maven central throttling). Code logic verified against standard Sentinel conventions.

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PR created automatically by Jules for task 4324315215235687672 started by @manupawickramasinghe

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