A few small docs updates (#224)

* Update some docs.

* wip

* Update Sources/SQLiteData/Documentation.docc/Articles/CloudKit.md

---------

Co-authored-by: Stephen Celis <stephen@stephencelis.com>

Author: mbrandonw

Sources/SQLiteData/CloudKit/SyncEngine.swift

@@ -144,13 +144,7 @@
       }
 
       guard let containerIdentifier else {
-        throw SchemaError(
-          reason: .noCloudKitContainer,
-          debugDescription: """
-            No default CloudKit container found. Please add a container identifier to your app's \
-            entitlements.
-            """
-        )
+        throw SchemaError.noCloudKitContainer
       }
 
       let container = CKContainer(identifier: containerIdentifier)
@@ -1868,13 +1862,7 @@
         ?? ModelConfiguration(groupContainer: .automatic).cloudKitContainerIdentifier
 
       guard let containerIdentifier else {
-        throw SyncEngine.SchemaError(
-          reason: .noCloudKitContainer,
-          debugDescription: """
-            No default CloudKit container found. Please add a container identifier to your app's \
-            entitlements.
-            """
-        )
+        throw SyncEngine.SchemaError.noCloudKitContainer
       }
 
       let databasePath = try PragmaDatabaseList.select(\.file).fetchOne(self)
@@ -1929,6 +1917,14 @@
       package var errorDescription: String? {
         "Could not synchronize data with iCloud."
       }
+
+      static let noCloudKitContainer = Self(
+        reason: .noCloudKitContainer,
+        debugDescription: """
+          No default CloudKit container found. Make sure to enable iCloud entitlements in your \
+          app's "Signing & Capabilities" and add a container identifier.
+          """
+      )
     }
 
     fileprivate func validateSchema() throws {

Sources/SQLiteData/Documentation.docc/Articles/CloudKit.md

@@ -41,8 +41,8 @@ The steps to set up your SQLiteData project for CloudKit synchronization are the
 [same for setting up][setup-cloudkit-apple] any other kind of project for CloudKit:
 
   * Follow the [Configuring iCloud services] guide for enabling iCloud entitlements in your project.
-  * Follow the [Configuring background execution modes] guide for adding the Background Modes
-    capability to your project.
+  * Follow the [Configuring background execution modes] guide for adding the "Background Modes"
+    capability to your project and turning on "Remote notifications".
   * If you want to enable sharing of records with other iCloud users, be sure to add a
     `CKSharingSupported` key to your Info.plist with a value of `true`. This is subtly documented
     in [Apple's documentation for sharing].
@@ -716,10 +716,6 @@ migrator.registerMigration("Convert 'remindersLists' table primary key to UUID")
   // IDs to UUIDs
   try #sql("""
     INSERT INTO "new_remindersLists"
-    (
-      "id",
-      -- all other columns from 'remindersLists' table
-    )
     SELECT
       -- This converts integers to UUIDs, e.g. 1 -> 00000000-0000-0000-0000-000000000001
       '00000000-0000-0000-0000-' || printf('%012x', "id"),
@@ -763,11 +759,6 @@ migrator.registerMigration("Convert 'reminders' table primary key to UUID") { db
   // IDs to UUIDs
   try #sql("""
     INSERT INTO "new_reminders"
-    (
-      "id",
-      "remindersListID",
-      -- all other columns from 'reminders' table
-    )
     SELECT
       -- This converts integers to UUIDs, e.g. 1 -> 00000000-0000-0000-0000-000000000001
       '00000000-0000-0000-0000-' || printf('%012x', "id"),