refactor(db): port auth and security handlers to sqlc (#83)

- auth.sql: user lookups, counts, register/mirror inserts, profile update
- security.sql: access EXISTS, vulnerability list/metrics/status,
  framework list, latest scan/report, project-id guards
- NULL description/service_id rows stay filtered, matching the original
  scan-error-and-skip behavior
- auth_users probe and filtered audit-log queries stay raw: one is a
  Better Auth table outside the schema, the other is dynamically built
- TestSecurityLiveInvariants covers the access predicate, severity
  ordering, upsert conflict path, and latest-row lookups against live
  Postgres

Authored By: TDvorak <[email protected]>

app/backend/sqlc/queries/security.sql

@@ -0,0 +1,78 @@
+-- name: GetProjectOwnerText :one
+SELECT owner_id::text FROM projects WHERE id = $1;
+
+-- name: ServiceExistsInProject :one
+SELECT EXISTS(SELECT 1 FROM services WHERE id = $1 AND project_id = $2);
+
+-- name: ListVulnerabilities :many
+SELECT id, type, severity, title, description, service_id, status, found_at, resolved_at
+FROM vulnerabilities
+WHERE project_id = $1
+ORDER BY
+    CASE severity
+        WHEN 'critical' THEN 1
+        WHEN 'high' THEN 2
+        WHEN 'medium' THEN 3
+        WHEN 'low' THEN 4
+    END,
+    found_at DESC;
+
+-- name: UpdateVulnerabilityStatus :exec
+UPDATE vulnerabilities SET status = $1, resolved_at = $2 WHERE id = $3;
+
+-- name: ComplianceFrameworkExists :one
+SELECT EXISTS(SELECT 1 FROM compliance_frameworks WHERE id = $1);
+
+-- name: ListComplianceFrameworks :many
+SELECT id, name, description, version, enabled, created_at
+FROM compliance_frameworks
+WHERE enabled = true
+ORDER BY name;
+
+-- name: GetVulnerabilityMetrics :one
+SELECT
+    COUNT(*) AS total,
+    COUNT(*) FILTER (WHERE severity = 'critical') AS critical,
+    COUNT(*) FILTER (WHERE severity = 'high') AS high,
+    COUNT(*) FILTER (WHERE severity = 'medium') AS medium,
+    COUNT(*) FILTER (WHERE severity = 'low') AS low,
+    COUNT(*) FILTER (WHERE status = 'open') AS open,
+    COUNT(*) FILTER (WHERE status = 'resolved') AS resolved
+FROM vulnerabilities
+WHERE project_id = $1;
+
+-- name: GetLatestSecurityScan :one
+SELECT id, COALESCE((summary->>'score')::int, 0)::int AS score, started_at AS scanned_at, status
+FROM security_scans
+WHERE project_id = $1
+ORDER BY started_at DESC
+LIMIT 1;
+
+-- name: GetLatestComplianceReport :one
+SELECT overall_status, score, assessment_date
+FROM compliance_reports
+WHERE project_id = $1
+ORDER BY assessment_date DESC
+LIMIT 1;
+
+-- name: CheckSecurityProjectAccess :one
+SELECT EXISTS (
+    SELECT 1
+    FROM projects p
+    WHERE p.id = $1
+      AND (p.is_approved
+           OR $3::bool
+           OR p.owner_id = $2 OR EXISTS (
+            SELECT 1 FROM project_members pm
+            WHERE pm.project_id = p.id AND pm.user_id = $2
+      ))
+);
+
+-- name: GetSecurityScanProjectID :one
+SELECT project_id FROM security_scans WHERE id = $1;
+
+-- name: GetComplianceReportProjectID :one
+SELECT project_id FROM compliance_reports WHERE id = $1;
+
+-- name: GetVulnerabilityProjectID :one
+SELECT project_id FROM vulnerabilities WHERE id = $1;