fix: review fixes for autoLimitStyle, MSSQL schema reset, and DDL fetch guard

Author: datlechin

TablePro/Core/Plugins/PluginManager.swift

@@ -496,7 +496,8 @@ final class PluginManager {
 
     func autoLimitStyle(for databaseType: DatabaseType) -> AutoLimitStyle {
         guard let plugin = driverPlugin(for: databaseType) else { return .limit }
-        return Swift.type(of: plugin).sqlDialect?.autoLimitStyle ?? .limit
+        guard let dialect = Swift.type(of: plugin).sqlDialect else { return .none }
+        return dialect.autoLimitStyle
     }
 
     func paginationStyle(for databaseType: DatabaseType) -> SQLDialectDescriptor.PaginationStyle {

TablePro/Views/Main/Extensions/MainContentCoordinator+Navigation.swift

@@ -334,8 +334,11 @@ extension MainContentCoordinator {
                 if let adapter = driver as? PluginDriverAdapter {
                     try await adapter.switchDatabase(to: database)
                 }
+                let defaultSchema = pm.defaultSchemaName(for: connection.type)
                 DatabaseManager.shared.updateSession(connectionId) { session in
                     session.currentDatabase = database
+                    // Reset schema to plugin default (e.g. "dbo" for MSSQL)
+                    session.currentSchema = defaultSchema
                 }
             }
             AppSettingsStorage.shared.saveLastDatabase(database, for: connectionId)

TablePro/Views/Main/MainContentCoordinator.swift

@@ -953,8 +953,10 @@ final class MainContentCoordinator {
             }
         }
 
-        // Fetch CHECK constraint pseudo-enum values from DDL (matches only SQLite-style constraints)
-        if let createSQL = try? await driver.fetchTableDDL(table: tableName) {
+        // Fetch CHECK constraint pseudo-enum values from DDL (SQLite-style CHECK ... IN constraints).
+        // Only attempt DDL parsing when no enum values were found via catalog (avoids unnecessary
+        // fetchTableDDL calls for databases that don't use CHECK constraints for enums).
+        if result.isEmpty, let createSQL = try? await driver.fetchTableDDL(table: tableName) {
             let columns = try? await driver.fetchColumns(table: tableName)
             for col in columns ?? [] {
                 if let values = Self.parseSQLiteCheckConstraintValues(