Add CCP Metrics page with multi-vertical VCL upload and cross-org reporting

New feature: multi-file per-vertical compliance xlsx upload with scoped
resolution logic, executive-level aggregated reporting, and drill-down
by vertical and metric. Supports daily upload cadence and batch commit.

Backend:
- Migration: add vertical column to compliance_items/uploads, create
  vcl_multi_vertical_summary table
- New route module: routes/vclMultiVertical.js with preview, commit,
  stats, trend, metric drill-down, device list, and burndown endpoints
- New helpers: parseVerticalFilename(), computeVerticalBurndown()
- Vertical-scoped resolution: uploading one vertical never resolves
  items from other verticals

Frontend:
- CCPMetricsPage with stats bar, trend chart, donut, vertical table
- Drill-down: vertical -> metrics by category -> device list
- Per-vertical burndown forecast chart
- MultiVerticalUploadModal: multi-file drag-drop, batch preview, commit
- Nav entry: CCP Metrics (Building2 icon)

Docs:
- Design brief for stakeholder meeting (docs/vcl-multi-vertical-design-brief.md)

backend/migrations/add_vcl_multi_vertical.js

@@ -0,0 +1,65 @@
+// Migration: Add multi-vertical support for VCL compliance reporting
+// Adds vertical column to compliance_items and compliance_uploads,
+// creates vcl_multi_vertical_summary table for per-vertical metric data.
+const pool = require('../db');
+
+async function run() {
+    console.log('Starting VCL multi-vertical migration...');
+    try {
+        // Add vertical column to compliance_items
+        await pool.query(`ALTER TABLE compliance_items ADD COLUMN IF NOT EXISTS vertical TEXT DEFAULT NULL`);
+        console.log('✓ vertical column added to compliance_items');
+
+        await pool.query(`CREATE INDEX IF NOT EXISTS idx_compliance_items_vertical ON compliance_items(vertical)`);
+        console.log('✓ idx_compliance_items_vertical index created');
+
+        await pool.query(`CREATE INDEX IF NOT EXISTS idx_compliance_items_vertical_status ON compliance_items(vertical, status)`);
+        console.log('✓ idx_compliance_items_vertical_status index created');
+
+        await pool.query(`CREATE INDEX IF NOT EXISTS idx_compliance_items_vertical_metric ON compliance_items(vertical, metric_id, status)`);
+        console.log('✓ idx_compliance_items_vertical_metric index created');
+
+        // Add vertical column to compliance_uploads
+        await pool.query(`ALTER TABLE compliance_uploads ADD COLUMN IF NOT EXISTS vertical TEXT DEFAULT NULL`);
+        console.log('✓ vertical column added to compliance_uploads');
+
+        // Create summary table for per-vertical metric data from Summary sheets
+        await pool.query(`
+            CREATE TABLE IF NOT EXISTS vcl_multi_vertical_summary (
+                id              SERIAL PRIMARY KEY,
+                upload_id       INTEGER NOT NULL REFERENCES compliance_uploads(id) ON DELETE CASCADE,
+                vertical        TEXT NOT NULL,
+                metric_id       TEXT NOT NULL,
+                metric_desc     TEXT DEFAULT '',
+                category        TEXT DEFAULT 'Other',
+                team            TEXT DEFAULT '',
+                priority        TEXT DEFAULT '',
+                non_compliant   INTEGER DEFAULT 0,
+                compliant       INTEGER DEFAULT 0,
+                total           INTEGER DEFAULT 0,
+                compliance_pct  NUMERIC(5,2) DEFAULT 0,
+                target          NUMERIC(5,2) DEFAULT 0,
+                status          TEXT DEFAULT '',
+                created_at      TIMESTAMPTZ DEFAULT NOW()
+            )
+        `);
+        console.log('✓ vcl_multi_vertical_summary table created');
+
+        await pool.query(`CREATE INDEX IF NOT EXISTS idx_vcl_multi_summary_vertical ON vcl_multi_vertical_summary(vertical)`);
+        console.log('✓ idx_vcl_multi_summary_vertical index created');
+
+        await pool.query(`CREATE INDEX IF NOT EXISTS idx_vcl_multi_summary_upload ON vcl_multi_vertical_summary(upload_id)`);
+        console.log('✓ idx_vcl_multi_summary_upload index created');
+
+        await pool.query(`CREATE INDEX IF NOT EXISTS idx_vcl_multi_summary_vertical_metric ON vcl_multi_vertical_summary(vertical, metric_id)`);
+        console.log('✓ idx_vcl_multi_summary_vertical_metric index created');
+
+    } catch (err) {
+        console.error('Migration error:', err.message);
+        process.exit(1);
+    }
+    console.log('Migration complete.');
+    process.exit(0);
+}
+
+run();