Add SBOM enhancements, delete repo feature, and embedding build spinner

- Fix SBOM display bug by removing incorrect BSON serde helpers on DateTime fields
- Add filtered/searchable SBOM list with repo, package manager, search, vuln, and license filters
- Add SBOM export (CycloneDX 1.5 / SPDX 2.3), license compliance tab, and cross-repo diff
- Add vulnerability drill-down with inline CVE details and advisory links
- Add DELETE /api/v1/repositories/{id} with cascade delete of all related data
- Add delete repository button with confirmation modal warning in dashboard
- Add spinner and progress bar for embedding builds with auto-polling status
- Install syft in agent Dockerfile for SBOM generation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

compliance-dashboard/assets/graph-viz.js

@@ -169,20 +169,20 @@
         enabled: true,
         solver: "forceAtlas2Based",
         forceAtlas2Based: {
-          gravitationalConstant: -60,
-          centralGravity: 0.012,
-          springLength: 80,
-          springConstant: 0.06,
-          damping: 0.4,
-          avoidOverlap: 0.5,
+          gravitationalConstant: -80,
+          centralGravity: 0.005,
+          springLength: 120,
+          springConstant: 0.04,
+          damping: 0.5,
+          avoidOverlap: 0.6,
         },
         stabilization: {
           enabled: true,
-          iterations: 1000,
+          iterations: 1500,
           updateInterval: 25,
         },
-        maxVelocity: 40,
-        minVelocity: 0.1,
+        maxVelocity: 50,
+        minVelocity: 0.75,
       },
       interaction: {
         hover: true,
@@ -252,7 +252,24 @@
           overlay.style.display = "none";
         }, 900);
       }
-      network.setOptions({ physics: { enabled: false } });
+      // Keep physics running so nodes float and respond to dragging,
+      // but reduce forces for a calm, settled feel
+      network.setOptions({
+        physics: {
+          enabled: true,
+          solver: "forceAtlas2Based",
+          forceAtlas2Based: {
+            gravitationalConstant: -40,
+            centralGravity: 0.003,
+            springLength: 120,
+            springConstant: 0.03,
+            damping: 0.7,
+            avoidOverlap: 0.6,
+          },
+          maxVelocity: 20,
+          minVelocity: 0.75,
+        },
+      });
     });
 
     console.log(