refactor: Remove unused swift-perception dependency, target macOS 15+ only

- Remove `import Perception` from FetchSubscription.swift (was unused)
- Add explicit `import ConcurrencyExtras` for LockIsolated
- Remove swift-perception package dependency from Package.swift
- Update platforms to macOS 15+ only (drop iOS/tvOS/watchOS)
- Update Package@swift-6.0.swift similarly

The Perception import was never actually used - the file only uses
LockIsolated (from ConcurrencyExtras) and SharedReader (from Sharing).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Stijn Willems

Package.swift

@@ -5,10 +5,7 @@ import PackageDescription
 let package = Package(
   name: "sqlite-data",
   platforms: [
-    .iOS(.v13),
-    .macOS(.v10_15),
-    .tvOS(.v13),
-    .watchOS(.v7),
+    .macOS(.v15),
   ],
   products: [
     .library(
@@ -32,7 +29,6 @@ let package = Package(
     .package(url: "https://github.com/pointfreeco/swift-concurrency-extras", from: "1.0.0"),
     .package(url: "https://github.com/pointfreeco/swift-custom-dump", from: "1.3.3"),
     .package(url: "https://github.com/pointfreeco/swift-dependencies", from: "1.9.0"),
-    .package(url: "https://github.com/pointfreeco/swift-perception", from: "2.0.0"),
     .package(url: "https://github.com/pointfreeco/swift-sharing", from: "2.3.0"),
     .package(url: "https://github.com/pointfreeco/swift-snapshot-testing", from: "1.18.4"),
     .package(
@@ -54,7 +50,6 @@ let package = Package(
         .product(name: "GRDB", package: "GRDB.swift"),
         .product(name: "IssueReporting", package: "xctest-dynamic-overlay"),
         .product(name: "OrderedCollections", package: "swift-collections"),
-        .product(name: "Perception", package: "swift-perception"),
         .product(name: "Sharing", package: "swift-sharing"),
         .product(name: "StructuredQueriesSQLite", package: "swift-structured-queries"),
         .product(

Package@swift-6.0.swift

@@ -5,10 +5,7 @@ import PackageDescription
 let package = Package(
   name: "sqlite-data",
   platforms: [
-    .iOS(.v13),
-    .macOS(.v10_15),
-    .tvOS(.v13),
-    .watchOS(.v7),
+    .macOS(.v15),
   ],
   products: [
     .library(

Sources/SQLiteData/FetchSubscription.swift

@@ -1,4 +1,4 @@
-import Perception
+import ConcurrencyExtras
 import Sharing
 
 /// A subscription associated with `@FetchAll`, `@FetchOne`, and `@Fetch` observation.