fix CVE data sync and signalr join

src/Agent/AutopilotMonitor.Agent/buildcounter.txt

@@ -1 +1 @@
-623
+627

src/Backend/AutopilotMonitor.Functions/Functions/Vulnerability/VulnerabilityDataSyncFunction.cs

@@ -200,11 +200,14 @@ namespace AutopilotMonitor.Functions.Functions.Vulnerability
 
                         var cveDataJson = System.Text.Json.JsonSerializer.Serialize(cves);
 
-                        // Guard 64KB limit
-                        if (cveDataJson.Length > 60_000)
+                        // Guard 64KB limit — iteratively halve until it fits
+                        var cacheCves = cves;
+                        while (cveDataJson.Length > 60_000 && cacheCves.Count > 10)
                         {
-                            var reduced = cves.Take(cves.Count / 2).ToList();
-                            cveDataJson = System.Text.Json.JsonSerializer.Serialize(reduced);
+                            cacheCves = cacheCves.Take(cacheCves.Count / 2).ToList();
+                            cveDataJson = System.Text.Json.JsonSerializer.Serialize(cacheCves);
+                            _logger.LogInformation("[VulnSync] Reduced CVE cache for {CpeUri} to {Count} entries ({Bytes} chars)",
+                                cpeUri, cacheCves.Count, cveDataJson.Length);
                         }
 
                         var data = new Dictionary<string, object>

src/Backend/AutopilotMonitor.Functions/Security/EndpointAccessPolicyCatalog.cs

@@ -92,8 +92,8 @@ public static class EndpointAccessPolicyCatalog
         new("GET",    "auth/me",                   EndpointPolicy.AuthenticatedUser),
         new("GET",    "auth/is-global-admin",      EndpointPolicy.AuthenticatedUser),
         new("POST",   "realtime/negotiate",        EndpointPolicy.AuthenticatedUser),
-        new("POST",   "realtime/groups/join",      EndpointPolicy.AuthenticatedUser),
-        new("POST",   "realtime/groups/leave",     EndpointPolicy.AuthenticatedUser),
+        new("POST",   "realtime/groups/join",      EndpointPolicy.MemberRead),
+        new("POST",   "realtime/groups/leave",     EndpointPolicy.MemberRead),
         new("GET",    "progress/sessions",         EndpointPolicy.AuthenticatedUser),
         new("GET",    "progress/sessions/{sessionId}/events", EndpointPolicy.AuthenticatedUser),
         new("PUT",    "preview/notification-email", EndpointPolicy.AuthenticatedUser),

src/Backend/AutopilotMonitor.Functions/Services/Vulnerability/VulnerabilityCorrelationService.cs

@@ -474,20 +474,31 @@ namespace AutopilotMonitor.Functions.Services.Vulnerability
             // Persist to repository (best-effort, don't fail the request)
             try
             {
-                var cveDataJson = JsonSerializer.Serialize(cves, JsonOptions);
+                var cacheCves = cves
+                    .OrderByDescending(c => c.CvssScore)
+                    .ThenByDescending(c => c.PublishedDate)
+                    .ToList();
+                var cveDataJson = JsonSerializer.Serialize(cacheCves, JsonOptions);
 
                 // Guard against exceeding Table Storage 64KB single-property limit
+                // Iteratively halve until it fits (floor: 10 CVEs)
+                while (cveDataJson.Length > 60_000 && cacheCves.Count > 10)
+                {
+                    cacheCves = cacheCves.Take(cacheCves.Count / 2).ToList();
+                    cveDataJson = JsonSerializer.Serialize(cacheCves, JsonOptions);
+                    _logger.LogInformation("Reduced CVE cache for {CpeUri} to {Count} entries ({Bytes} chars) to fit 64KB limit",
+                        cpeUri, cacheCves.Count, cveDataJson.Length);
+                }
+
+                // Last resort: strip Criteria strings (biggest space consumer) and retry
                 if (cveDataJson.Length > 60_000)
                 {
-                    // Further reduce until it fits
-                    var reduced = cves
-                        .OrderByDescending(c => c.CvssScore)
-                        .ThenByDescending(c => c.PublishedDate)
-                        .Take(cves.Count / 2)
-                        .ToList();
-                    cveDataJson = JsonSerializer.Serialize(reduced, JsonOptions);
-                    _logger.LogInformation("Further reduced CVE cache for {CpeUri} to {Count} entries to fit 64KB limit",
-                        cpeUri, reduced.Count);
+                    foreach (var c in cacheCves)
+                        foreach (var v in c.AffectedVersions)
+                            v.Criteria = null;
+                    cveDataJson = JsonSerializer.Serialize(cacheCves, JsonOptions);
+                    _logger.LogWarning("Stripped Criteria from CVE cache for {CpeUri} to fit 64KB limit ({Bytes} chars)",
+                        cpeUri, cveDataJson.Length);
                 }
 
                 var data = new Dictionary<string, object>