fix: update search filtering to give more accurate results

[adpare]

Description of what has changed

Improved ATT&CK ID search relevance.

• Exact ID queries such as T1105 now show the matching ATT&CK object first.
• Four-digit searches such as 1005 return matching complete IDs, such as T1005 and S1005, instead of unrelated prefix matches.
• Parent-technique searches include matching sub-techniques.

Issues addressed by pull request

Addresses #596 and #626

[sonarqubecloud]

Quality Gate passed

Issues
2 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