Implement LDAP Provider Phase 2.1: DataProvider trait with OpenLDAP/AD support

markbase-core/Cargo.toml

@@ -84,11 +84,15 @@ async-trait = "0.1"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
 
+# === LDAP Authentication (Phase 2) ===
+ldap3 = { version = "0.11", optional = true }  # Async LDAP client (compatible with AD + OpenLDAP)
+
 [features]
 default = []                          # 默认不启用可选格式
 optional-formats = ["unrar", "xz2", "sevenz-rust"]  # 争议格式可选启用
 smb-server = ["dep:smb-server"]       # SMB server feature flag
 async-vfs = ["dep:reqwest"]           # Async VfsBackend trait + native async S3
+ldap = ["dep:ldap3"]                  # LDAP authentication provider
 
 [dev-dependencies]
 # tempfile moved to dependencies (needed for archive extraction)