🔒 [CRITICAL] Fix SQL injection vulnerability in ItemController queries

[ManupaKDU]

🎯 What: The vulnerability fixed
Fixed multiple instances of SQL Injection in ItemController.java where user-controlled input (query.toUpperCase()) was directly concatenated into JPQL query strings (e.g., in completeAmpAndAmppItem, completePackage, etc.).

⚠️ Risk: The potential impact if left unfixed
Direct string concatenation in JPQL queries allows attackers to inject malicious JPQL, potentially enabling unauthorized data access, exfiltration of sensitive hospital/inventory information, or denial of service by crafting resource-intensive queries.

🛡️ Solution: How the fix addresses the vulnerability
Replaced the direct string concatenation with parameterized JPQL queries using named parameters (e.g., :q). The case-insensitive matching logic was preserved by using the JPQL upper() function on the columns (e.g., upper(c.name) like :q) and passing the uppercased input into the parameter map.

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PR created automatically by Jules for task 18283260539139786552 started by @manupawickramasinghe

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