Add all vendor project keys and update docs for issue type dropdown

Expand VENDOR_PROJECT_KEYS to include all vendor projects: AA_ADTRAN,
AA_ADVA, AA_CASA, AA_CISCO, AACOMMSCOP, AA_COMMSCOP, AA_HARMONI,
AA_JUNIPER, AA_VECIMA, AA_VIAVI. Both AACOMMSCOP and AA_COMMSCOP
variants are included for safety.

Update property tests to exercise the full vendor key list instead of
only AA_VECIMA. Update full-reference-manual.md with vendor-specific
issue type dropdown documentation.

frontend/src/components/pages/JiraPage.js

@@ -160,7 +160,18 @@ function getStatusColor(status) {
 // Vendor issue type configuration
 // ---------------------------------------------------------------------------
 // Add new vendor project keys here to enable vendor-specific issue types
-const VENDOR_PROJECT_KEYS = ['AA_VECIMA'];
+const VENDOR_PROJECT_KEYS = [
+  'AA_ADTRAN',
+  'AA_ADVA',
+  'AA_CASA',
+  'AA_CISCO',
+  'AACOMMSCOP',
+  'AA_COMMSCOP',
+  'AA_HARMONI',
+  'AA_JUNIPER',
+  'AA_VECIMA',
+  'AA_VIAVI',
+];
 
 const VENDOR_ISSUE_TYPES = [
   'Epic',