fix(networking): implement thread-safe access patterns for Swift 6 compatibility

- refactor(APIClient): add synchronized property accessors with queue.sync
- fix(concurrency): ensure proper barrier flags for collection operations
- refactor(StreamingSessionDelegate): implement thread-safe data buffer access
- fix(SendablePromise): add queue-based synchronization for callback execution
- chore(Sendable): handle @unchecked Sendable conformance properly

This commit addresses potential data races detected by Thread Sanitizer and ensures
compliance with Swift 6's stricter Sendable protocol requirements.

Author: siamakrostami

Example/SRNetworkManagerExampleApp.xcodeproj/project.pbxproj

@@ -7,7 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		011108B52D109AF400B9C858 /* SRNetworkManager in Frameworks */ = {isa = PBXBuildFile; productRef = 011108B42D109AF400B9C858 /* SRNetworkManager */; };
+		01BC1EF02D95D06000DF8431 /* SRNetworkManager in Frameworks */ = {isa = PBXBuildFile; productRef = 01BC1EEF2D95D06000DF8431 /* SRNetworkManager */; };
 		D50FF5E02D10478B008AF330 /* SRNetworkManager in Frameworks */ = {isa = PBXBuildFile; productRef = D50FF5DF2D10478B008AF330 /* SRNetworkManager */; };
 /* End PBXBuildFile section */
 
@@ -28,7 +28,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				011108B52D109AF400B9C858 /* SRNetworkManager in Frameworks */,
+				01BC1EF02D95D06000DF8431 /* SRNetworkManager in Frameworks */,
 				D50FF5E02D10478B008AF330 /* SRNetworkManager in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -73,7 +73,7 @@
 			name = SRNetworkManagerExampleApp;
 			packageProductDependencies = (
 				D50FF5DF2D10478B008AF330 /* SRNetworkManager */,
-				011108B42D109AF400B9C858 /* SRNetworkManager */,
+				01BC1EEF2D95D06000DF8431 /* SRNetworkManager */,
 			);
 			productName = SRGenericNetworkLayerExampleApp;
 			productReference = 017913072C9E03770011B237 /* SRNetworkManagerExampleApp.app */;
@@ -104,7 +104,7 @@
 			mainGroup = 017912FE2C9E03770011B237;
 			minimizedProjectReferenceProxies = 1;
 			packageReferences = (
-				011108B32D109AF400B9C858 /* XCRemoteSwiftPackageReference "SRNetworkManager" */,
+				01BC1EEE2D95D06000DF8431 /* XCLocalSwiftPackageReference "../../SRGenericNetworkLayer" */,
 			);
 			preferredProjectObjectVersion = 77;
 			productRefGroup = 017913082C9E03770011B237 /* Products */;
@@ -337,21 +337,16 @@
 		};
 /* End XCConfigurationList section */
 
-/* Begin XCRemoteSwiftPackageReference section */
-		011108B32D109AF400B9C858 /* XCRemoteSwiftPackageReference "SRNetworkManager" */ = {
-			isa = XCRemoteSwiftPackageReference;
-			repositoryURL = "https://github.com/siamakrostami/SRNetworkManager";
-			requirement = {
-				kind = upToNextMinorVersion;
-				minimumVersion = 1.0.17;
-			};
+/* Begin XCLocalSwiftPackageReference section */
+		01BC1EEE2D95D06000DF8431 /* XCLocalSwiftPackageReference "../../SRGenericNetworkLayer" */ = {
+			isa = XCLocalSwiftPackageReference;
+			relativePath = ../../SRGenericNetworkLayer;
 		};
-/* End XCRemoteSwiftPackageReference section */
+/* End XCLocalSwiftPackageReference section */
 
 /* Begin XCSwiftPackageProductDependency section */
-		011108B42D109AF400B9C858 /* SRNetworkManager */ = {
+		01BC1EEF2D95D06000DF8431 /* SRNetworkManager */ = {
 			isa = XCSwiftPackageProductDependency;
-			package = 011108B32D109AF400B9C858 /* XCRemoteSwiftPackageReference "SRNetworkManager" */;
 			productName = SRNetworkManager;
 		};
 		D50FF5DF2D10478B008AF330 /* SRNetworkManager */ = {

Example/SRNetworkManagerExampleApp.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1620"
+   version = "1.7">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES"
+      buildArchitectures = "Automatic">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "017913062C9E03770011B237"
+               BuildableName = "SRNetworkManagerExampleApp.app"
+               BlueprintName = "SRNetworkManagerExampleApp"
+               ReferencedContainer = "container:SRNetworkManagerExampleApp.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldAutocreateTestPlan = "YES">
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      enableThreadSanitizer = "YES"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "017913062C9E03770011B237"
+            BuildableName = "SRNetworkManagerExampleApp.app"
+            BlueprintName = "SRNetworkManagerExampleApp"
+            ReferencedContainer = "container:SRNetworkManagerExampleApp.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "017913062C9E03770011B237"
+            BuildableName = "SRNetworkManagerExampleApp.app"
+            BlueprintName = "SRNetworkManagerExampleApp"
+            ReferencedContainer = "container:SRNetworkManagerExampleApp.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>