🔒 Fix SQL Injection in MainController.loadBookInfo2

[G30RG3-GJ]

This PR fixes a SQL Injection vulnerability in src/library/assistant/ui/main/MainController.java. The loadBookInfo2 method was constructing a SQL query by concatenating the user-provided bookID directly into the string, making it vulnerable to injection attacks.

Changes:

• Added getIssueDetails method to src/library/assistant/database/DataHelper.java. This method uses PreparedStatement to safely execute the query.
• Updated src/library/assistant/ui/main/MainController.java to use DataHelper.getIssueDetails instead of executing the raw query string.
• Added a unit test testGetIssueDetails in test/library/assistant/database/DataHelperTest.java to verify the fix and ensure the query is properly parameterized.

Risk:

• If left unfixed, an attacker could manipulate the bookID input to execute arbitrary SQL commands, potentially reading sensitive data or modifying the database.

Verification:

• Verified the query string logic.
• Ran unit tests using run_tests.sh to confirm the new test passes and existing functionality is preserved.

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PR created automatically by Jules for task 17736137760575823557 started by @G30RG3-GJ

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