docs(02-04): LDAP integration complete

.planning/phases/02-authentication-multi-tenancy/02-04-SUMMARY.md

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+# Plan 02-04: LDAP Integration — Summary
+
+**Status:** Complete
+**Date:** 2026-06-19
+
+## What Was Built
+
+### Task 1: Backend LDAP Module
+- LdapService using ldapts library for directory sync (NOT as auth — anti-pattern avoidance)
+- LdapConfigService for per-tenant LDAP configuration (D-18)
+- LdapSyncScheduler with configurable auto-sync interval (D-14)
+- Field mapping: configurable with defaults (displayName→Name, mail→Email, sAMAccountName→Username) (D-16)
+- Custom field mapping support (D-17)
+- Deactivation of removed LDAP users (D-15)
+- Manual sync endpoint POST /ldap/sync
+- Prisma schema extended with LdapConfig and LdapFieldMapping models
+
+### Task 2: Frontend LDAP Admin UI
+- LDAP settings page at /admin/ldap
+- Connection configuration form (server URL, base DN, bind user, filter)
+- Field mapping editor with default + custom fields
+- Test connection button
+- Manual sync trigger button
+- Sidebar navigation updated with LDAP admin link
+- i18n keys for DE/EN
+
+## Commits
+- `f928cd7`: LdapModule with sync service, config service, scheduler, controller
+- `6e19591`: LDAP admin UI with config, mapping editor, sync trigger
+
+## Requirements Addressed
+- AUTH-06: Users can be imported from LDAP/AD ✓
+- TNNT-01: LDAP data tenant-isolated via RLS ✓
+- TNNT-02: LDAP config per tenant ✓
+- TNNT-03: Per-request tenant context in LDAP operations ✓