fix(pitch-deck): GDPR compliance — automated cleanup, full Art. 13 notice

- runDataCleanup() replaces maskOverdueInvestors(): now also anonymizes
  never-activated invites after 90 days, deletes sessions + magic links
  older than 30 days, NULLs IPs in audit logs older than 30 days, and
  redacts email from audit log details JSONB for masked investors
- New /api/admin/cleanup POST endpoint for scheduled invocation
- New .gitea/workflows/pitch-cleanup.yml: daily cron at 02:00 UTC calls
  the cleanup endpoint so anonymization is genuinely automatic, not lazy
- Switch masking window from first_activity_at to last_login_at (30 days
  of inactivity; resets on each login)
- Both auth pages: DSGVO footer now covers all Art. 13 requirements —
  data categories, retention cutoffs, Art. 15–21 rights, contact address,
  LfDI Baden-Württemberg as supervisory authority

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

pitch-deck/lib/masking.ts

@@ -1,30 +1,97 @@
 import pool from '@/lib/db'
 
-const MASKING_HOURS = parseInt(process.env.DATA_MASKING_HOURS || '72')
+const MASKING_DAYS = parseInt(process.env.DATA_MASKING_DAYS || '30')
+const NEVER_ACTIVATED_DAYS = parseInt(process.env.NEVER_ACTIVATED_DAYS || '90')
 
-export async function maskOverdueInvestors(): Promise<void> {
-  const cutoff = new Date(Date.now() - MASKING_HOURS * 60 * 60 * 1000)
+export interface CleanupStats {
+  investors_masked: number
+  sessions_deleted: number
+  audit_ips_anonymized: number
+  audit_details_redacted: number
+  magic_links_deleted: number
+}
 
-  const { rows } = await pool.query<{ id: string }>(
+export async function runDataCleanup(): Promise<CleanupStats> {
+  const stats: CleanupStats = {
+    investors_masked: 0,
+    sessions_deleted: 0,
+    audit_ips_anonymized: 0,
+    audit_details_redacted: 0,
+    magic_links_deleted: 0,
+  }
+
+  const activeCutoff = new Date(Date.now() - MASKING_DAYS * 24 * 60 * 60 * 1000)
+  const neverActivatedCutoff = new Date(Date.now() - NEVER_ACTIVATED_DAYS * 24 * 60 * 60 * 1000)
+
+  // 1. Mask investors inactive for MASKING_DAYS
+  const { rows: maskedActive } = await pool.query<{ id: string }>(
     `UPDATE pitch_investors
      SET email = 'anon.' || id::text,
-         name = NULL,
-         company = NULL,
-         status = 'revoked',
-         data_masked_at = NOW(),
-         updated_at = NOW()
-     WHERE first_activity_at IS NOT NULL
-       AND first_activity_at < $1
+         name = NULL, company = NULL,
+         status = 'revoked', data_masked_at = NOW(), updated_at = NOW()
+     WHERE last_login_at IS NOT NULL
+       AND last_login_at < $1
        AND data_masked_at IS NULL
      RETURNING id`,
-    [cutoff],
+    [activeCutoff],
   )
 
-  if (rows.length > 0) {
+  // 2. Mask investors invited but never activated after NEVER_ACTIVATED_DAYS
+  const { rows: maskedNever } = await pool.query<{ id: string }>(
+    `UPDATE pitch_investors
+     SET email = 'anon.' || id::text,
+         name = NULL, company = NULL,
+         status = 'revoked', data_masked_at = NOW(), updated_at = NOW()
+     WHERE last_login_at IS NULL
+       AND created_at < $1
+       AND data_masked_at IS NULL
+     RETURNING id`,
+    [neverActivatedCutoff],
+  )
+
+  const allMaskedIds = [...maskedActive, ...maskedNever].map((r) => r.id)
+  stats.investors_masked = allMaskedIds.length
+
+  if (allMaskedIds.length > 0) {
+    // 3. Revoke sessions for newly masked investors
     await pool.query(
       `UPDATE pitch_sessions SET revoked = true
        WHERE investor_id = ANY($1::uuid[]) AND NOT revoked`,
-      [rows.map((r) => r.id)],
+      [allMaskedIds],
     )
+
+    // 4. Redact email field from audit log details for masked investors
+    const { rowCount } = await pool.query(
+      `UPDATE pitch_audit_logs
+       SET details = details - 'email'
+       WHERE investor_id = ANY($1::uuid[]) AND details ? 'email'`,
+      [allMaskedIds],
+    )
+    stats.audit_details_redacted = rowCount ?? 0
   }
+
+  // 5. Delete sessions older than MASKING_DAYS (expired, contain IP/UA)
+  const { rowCount: sessionsDeleted } = await pool.query(
+    `DELETE FROM pitch_sessions WHERE created_at < $1`,
+    [activeCutoff],
+  )
+  stats.sessions_deleted = sessionsDeleted ?? 0
+
+  // 6. Anonymize IP addresses in audit logs older than MASKING_DAYS
+  const { rowCount: logsAnonymized } = await pool.query(
+    `UPDATE pitch_audit_logs
+     SET ip_address = NULL
+     WHERE created_at < $1 AND ip_address IS NOT NULL`,
+    [activeCutoff],
+  )
+  stats.audit_ips_anonymized = logsAnonymized ?? 0
+
+  // 7. Delete magic links older than MASKING_DAYS
+  const { rowCount: linksDeleted } = await pool.query(
+    `DELETE FROM pitch_magic_links WHERE created_at < $1`,
+    [activeCutoff],
+  )
+  stats.magic_links_deleted = linksDeleted ?? 0
+
+  return stats
 }