feat: improve the LDAP implementation (#615)

* feat(logging): add PV_LOG_LEVEL environment variable to set backend log level

* feat(ldap): Adding a more verbose logging output to debug LDAP issues

* fix(ldap): fixed user logins with special characters within the users dn by switching to ldapts

* feat(ldap): made the member of and email attribute names configurable

* fix(ldap): properly handle email like usernames and fixing #601

* Revert "fix: disable email login if ldap is enabled"

This reverts commit d9cfe697d6.

* feat(ldap): disable the ability for a user to change his email when it's a LDAP user

* feat(ldap): relaxed username pattern by allowing the @ character in usernames

backend/package.json

@@ -25,7 +25,6 @@
     "@nestjs/throttler": "^6.2.1",
     "@prisma/client": "^5.19.1",
     "@types/jmespath": "^0.15.2",
-    "@types/ldapjs": "^3.0.6",
     "archiver": "^7.0.1",
     "argon2": "^0.41.1",
     "body-parser": "^1.20.3",
@@ -36,7 +35,7 @@
     "content-disposition": "^0.5.4",
     "cookie-parser": "^1.4.6",
     "jmespath": "^0.16.0",
-    "ldapjs": "^3.0.7",
+    "ldapts": "^7.2.0",
     "mime-types": "^2.1.35",
     "moment": "^2.30.1",
     "nanoid": "^3.3.7",
@@ -84,4 +83,4 @@
     "typescript": "^5.6.2",
     "wait-on": "^8.0.1"
   }
-}
+}