chore: rename cameleer3 to cameleer

Rename Java packages from com.cameleer3 to com.cameleer, module
directories from cameleer3-* to cameleer-*, and all references
throughout workflows, Dockerfiles, docs, migrations, and pom.xml.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/auth/OidcCallback.tsx

@@ -72,7 +72,7 @@ export function OidcCallback() {
     <div className={styles.page}>
       <Card>
         <div className={styles.card}>
-          <h2 className={styles.heading}>cameleer3</h2>
+          <h2 className={styles.heading}>cameleer</h2>
           {loading && <Spinner />}
           {error && (
             <>