Added check for non-default Automatic Tuning settings. Closes BrentOzarULTD#3800.

Many relevant views not touched, as mentioned on the issue.

Might need a re-design if Microsoft add more than one possible row per
database in sys.database_automatic_tuning_options.

Author: ReeceGoding

Documentation/sp_Blitz_Checks_by_Priority.md

@@ -6,8 +6,8 @@ Before adding a new check, make sure to add a Github issue for it first, and hav
 
 If you want to change anything about a check - the priority, finding, URL, or ID - open a Github issue first. The relevant scripts have to be updated too.
 
-CURRENT HIGH CHECKID: 274.
-If you want to add a new one, start at 275.
+CURRENT HIGH CHECKID: 275.
+If you want to add a new one, start at 276.
 
 | Priority | FindingsGroup | Finding | URL | CheckID |
 |----------|-----------------------------|---------------------------------------------------------|------------------------------------------------------------------------|----------|
@@ -278,6 +278,7 @@ If you want to add a new one, start at 275.
 | 210 | Non-Default Database Config | Trustworthy Enabled | https://www.BrentOzar.com/go/dbdefaults | 137 |
 | 210 | Non-Default Database Config | Broker Enabled | https://www.BrentOzar.com/go/dbdefaults | 230 |
 | 210 | Non-Default Database Config | Honor Broker Priority Enabled | https://www.BrentOzar.com/go/dbdefaults | 231 |
+| 210 | Non-Default Database Config | Automatic Tuning | https://learn.microsoft.com/en-us/sql/relational-databases/automatic-tuning/automatic-tuning | 275 |
 | 210 | Non-Default Database Scoped Config | MAXDOP | https://www.BrentOzar.com/go/dbscope | 194 |
 | 210 | Non-Default Database Scoped Config | Legacy CE | https://www.BrentOzar.com/go/dbscope | 195 |
 | 210 | Non-Default Database Scoped Config | Parameter Sniffing | https://www.BrentOzar.com/go/dbscope | 196 |

sp_Blitz.sql

@@ -8058,6 +8058,41 @@ EXEC dbo.sp_MSforeachdb 'USE [?]; SET TRANSACTION ISOLATION LEVEL READ UNCOMMITT
 									OPTION (RECOMPILE);';
 			END;
 
+			/* CheckID 275 - Non-Default Database Config - Automatic Tuning */
+			IF NOT EXISTS (
+					SELECT 1
+					FROM #SkipChecks
+					WHERE DatabaseName IS NULL
+						AND CheckID = 275
+					)
+                AND EXISTS (SELECT * FROM sys.all_objects WHERE name = 'database_automatic_tuning_options')
+			BEGIN
+				IF @Debug IN (1,2)
+				BEGIN
+					RAISERROR ('Running CheckId [%d].',0,1,275) WITH NOWAIT;
+				END
+
+				EXECUTE sp_MSforeachdb 'USE [?];
+					SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+                    INSERT INTO #BlitzResults (CheckID, DatabaseName, Priority, FindingsGroup, Finding, URL, Details)
+					SELECT 275 AS CheckID
+						,''?'' AS DatabaseName
+						,210 AS Priority
+						,''Non-Default Database Config'' AS FindingsGroup
+						,''Automatic Tuning'' AS Finding
+						,''https://learn.microsoft.com/en-us/sql/relational-databases/automatic-tuning/automatic-tuning'' AS URL
+                        /* Every column in sys.database_automatic_tuning_options is nullable, so we defend against that. */
+						,N''Automatic Tuning setting '' + ISNULL(dato.[name], ''unknown'') 
+                            + '' is configured to '' + ISNULL(dato.desired_state_desc, ''unknown'') + ''.''
+                            + '' This database setting is not the default.''
+                            + '' The running value is '' +  ISNULL(dato.actual_state_desc, ''unknown'') + ''.''
+                            + '' See sys.database_automatic_tuning_options for more details.'' AS Details
+					FROM sys.database_automatic_tuning_options dato
+					WHERE dato.desired_state IS NOT NULL AND dato.desired_state <> 2
+					AND ''?'' != ''rdsadmin''
+					;';
+			END; --of Check 275.
+
 			/* Check 218 - Show me the dodgy SET Options */
 			IF NOT EXISTS (
 					SELECT 1