Handle bad peptide_group_id values more gracefully

[labkey-jeckels]

Rationale

The crawler found a place where we return a 500 error for bad IDs on the URL

ERROR ExceptionUtil            2025-03-02T19:49:29,387    http-nio-8111-exec-10 : Unhandled exception: For input string: "">'>'"</script><img src="x" onerror="alert('8(')">"
java.lang.NumberFormatException: For input string: "">'>'"</script><img src="x" onerror="alert('8(')">"
	at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67) ~[?:?]
	at java.base/java.lang.Integer.parseInt(Integer.java:654) ~[?:?]
	at java.base/java.lang.Integer.parseInt(Integer.java:786) ~[?:?]
	at org.scharp.atlas.pepdb.PepDBController$DisplayPeptideGroupInformationAction.getView(PepDBController.java:445) ~[pepdb-25.3-SNAPSHOT.jar:?]
	at org.scharp.atlas.pepdb.PepDBController$DisplayPeptideGroupInformationAction.getView(PepDBController.java:438) ~[pepdb-25.3-SNAPSHOT.jar:?]
	at org.labkey.api.action.SimpleViewAction.handleRequest(SimpleViewAction.java:75) ~[api-25.3-SNAPSHOT.jar:?]

Changes

• Switch to a NotFoundException

[labkey-tchad]

This looks like a minor change to this action's behavior (blocking cross-folder peptide references) but I presume that is intended.