fix: compliance report iframe, findings tables, PDF fonts, delete session, orphan markers

- Compliance report iframe: removed auth requirement (UUIDs are non-guessable), fixed X-Frame-Options SAMEORIGIN on /api/
- Findings resource tables: compact HTML tables (max 4 cols, 10 rows) per non-compliant finding with affected resources from CSV
- PDF fonts: installed Liberation + DejaVu fonts in container, standardized font-family to Arial/Liberation Sans
- Delete session fix: terraform.ts used wrong URL /chat/sessions/{sid} instead of /chat/{sid}
- Chat deleteSession: read sessionId from store.getState() to avoid stale closure
- Orphan marker cleanup: startup removes stale .compliance_generating markers, status endpoint auto-expires after 10min
- Generate endpoint rejects duplicate requests while already generating
- Compliance iframe condition: only renders when ready AND not generating, prevents 404 flash
- Dockerfile: added fonts-liberation fonts-dejavu-core fontconfig packages

frontend-react/src/pages/ReportsPage.tsx

@@ -1338,9 +1338,10 @@ export default function ReportsPage() {
               />
             </div>
             {showCompliance && (
-              complianceReady ? (
+              complianceReady && !complianceGenerating ? (
                 <div>
                   <iframe
+                    key={selectedRid + '-' + complianceReady}
                     src={reportsApi.complianceReportUrl(selectedRid)}
                     className="w-full border-0"
                     style={{ height: 700, background: '#fff' }}
@@ -1356,7 +1357,6 @@ export default function ReportsPage() {
                     </a>
                     <button
                       onClick={startComplianceGeneration}
-                      disabled={complianceGenerating}
                       className="flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-[.68rem] font-medium cursor-pointer transition-colors"
                       style={{ background: 'var(--bg3)', color: 'var(--t2)', border: '1px solid var(--bd)' }}
                     >