refactor(core,logger)migrate to CherryPickObserver API and drop CherryPickLogger

BREAKING CHANGE:
- Removed the deprecated CherryPickLogger interface from cherrypick
- Logger/adapters (e.g., talker_cherrypick_logger) must now implement CherryPickObserver
- talker_cherrypick_logger: replace TalkerCherryPickLogger with TalkerCherryPickObserver
- All usages, docs, tests migrated to observer API
- Improved test mocks and integration tests for observer pattern
- Removed obsolete files: cherrypick/src/logger.dart, talker_cherrypick_logger/src/talker_cherrypick_logger.dart
- Updated README and example usages for new CherryPickObserver model

This refactor introduces a unified observer pattern (CherryPickObserver) to handle all DI lifecycle events, replacing the limited info/warn/error logger pattern.
All external logging adapters and integrations must migrate to use CherryPickObserver.

talker_cherrypick_logger/example/talker_cherrypick_logger_example.dart

@@ -3,11 +3,11 @@ import 'package:talker/talker.dart';
 
 void main() {
   final talker = Talker();
-  final logger = TalkerCherryPickLogger(talker);
+  final logger = TalkerCherryPickObserver(talker);
 
-  logger.info('Hello from CherryPickLogger!');
-  logger.warn('Something might be wrong...');
-  logger.error('Oops! An error occurred', Exception('Test error'));
+  logger.onDiagnostic('Hello from CherryPickLogger!');
+  logger.onWarning('Something might be wrong...');
+  logger.onError('Oops! An error occurred', Exception('Test error'), null);
 
   // Вывод всех логов
   print('\nВсе сообщения логирования через Talker:');

talker_cherrypick_logger/lib/src/talker_cherrypick_logger.dart

@@ -1,24 +0,0 @@
-import 'package:cherrypick/cherrypick.dart';
-import 'package:talker/talker.dart';
-
-/// Реализация CherryPickLogger для логирования через Talker
-class TalkerCherryPickLogger implements CherryPickLogger {
-  final Talker talker;
-
-  TalkerCherryPickLogger(this.talker);
-
-  @override
-  void info(String message) => talker.info('[CherryPick] $message');
-
-  @override
-  void warn(String message) => talker.warning('[CherryPick] $message');
-
-  @override
-  void error(String message, [Object? error, StackTrace? stackTrace]) {
-    talker.handle(
-      error ?? '[CherryPick] $message',
-      stackTrace,
-      '[CherryPick] $message',
-    );
-  }
-}

talker_cherrypick_logger/lib/src/talker_cherrypick_observer.dart

@@ -0,0 +1,66 @@
+import 'package:cherrypick/cherrypick.dart';
+import 'package:talker/talker.dart';
+
+/// CherryPickObserver-адаптер для логирования событий CherryPick через Talker
+class TalkerCherryPickObserver implements CherryPickObserver {
+  final Talker talker;
+
+  TalkerCherryPickObserver(this.talker);
+
+  @override
+  void onBindingRegistered(String name, Type type, {String? scopeName}) {
+    talker.info('[binding][CherryPick] $name — $type (scope: $scopeName)');
+  }
+  @override
+  void onInstanceRequested(String name, Type type, {String? scopeName}) {
+    talker.info('[request][CherryPick] $name — $type (scope: $scopeName)');
+  }
+  @override
+  void onInstanceCreated(String name, Type type, Object instance, {String? scopeName}) {
+    talker.info('[create][CherryPick] $name — $type => $instance (scope: $scopeName)');
+  }
+  @override
+  void onInstanceDisposed(String name, Type type, Object instance, {String? scopeName}) {
+    talker.info('[dispose][CherryPick] $name — $type => $instance (scope: $scopeName)');
+  }
+  @override
+  void onModulesInstalled(List<String> modules, {String? scopeName}) {
+    talker.info('[modules installed][CherryPick] ${modules.join(', ')} (scope: $scopeName)');
+  }
+  @override
+  void onModulesRemoved(List<String> modules, {String? scopeName}) {
+    talker.info('[modules removed][CherryPick] ${modules.join(', ')} (scope: $scopeName)');
+  }
+  @override
+  void onScopeOpened(String name) {
+    talker.info('[scope opened][CherryPick] $name');
+  }
+  @override
+  void onScopeClosed(String name) {
+    talker.info('[scope closed][CherryPick] $name');
+  }
+  @override
+  void onCycleDetected(List<String> chain, {String? scopeName}) {
+    talker.warning('[cycle][CherryPick] Detected: ${chain.join(' -> ')}${scopeName != null ? ' (scope: $scopeName)' : ''}');
+  }
+  @override
+  void onCacheHit(String name, Type type, {String? scopeName}) {
+    talker.info('[cache hit][CherryPick] $name — $type (scope: $scopeName)');
+  }
+  @override
+  void onCacheMiss(String name, Type type, {String? scopeName}) {
+    talker.info('[cache miss][CherryPick] $name — $type (scope: $scopeName)');
+  }
+  @override
+  void onDiagnostic(String message, {Object? details}) {
+    talker.verbose('[diagnostic][CherryPick] $message ${details ?? ''}');
+  }
+  @override
+  void onWarning(String message, {Object? details}) {
+    talker.warning('[warn][CherryPick] $message ${details ?? ''}');
+  }
+  @override
+  void onError(String message, Object? error, StackTrace? stackTrace) {
+    talker.handle(error ?? '[CherryPick] $message', stackTrace, '[error][CherryPick] $message');
+  }
+}

talker_cherrypick_logger/lib/talker_cherrypick_logger.dart

@@ -3,6 +3,6 @@
 /// More dartdocs go here.
 library;
 
-export 'src/talker_cherrypick_logger.dart';
+export 'src/talker_cherrypick_observer.dart';
 
 // TODO: Export any libraries intended for clients of this package.

talker_cherrypick_logger/pubspec.yaml

@@ -1,6 +1,7 @@
 name: talker_cherrypick_logger
 description: A starting point for Dart libraries or applications.
 version: 1.0.0
+publish_to: none
 # repository: https://github.com/my_org/my_repo
 
 environment:

talker_cherrypick_logger/test/talker_cherrypick_logger_test.dart

@@ -3,38 +3,44 @@ import 'package:talker/talker.dart';
 import 'package:talker_cherrypick_logger/talker_cherrypick_logger.dart';
 
 void main() {
-  group('TalkerCherryPickLogger', () {
+  group('TalkerCherryPickObserver', () {
     late Talker talker;
-    late TalkerCherryPickLogger logger;
+    late TalkerCherryPickObserver observer;
 
     setUp(() {
       talker = Talker();
-      logger = TalkerCherryPickLogger(talker);
+      observer = TalkerCherryPickObserver(talker);
     });
 
-    test('logs info messages correctly', () {
-      logger.info('Test info');
+    test('onInstanceRequested logs info', () {
+      observer.onInstanceRequested('A', String, scopeName: 'test');
       final log = talker.history.last;
-      expect(log.message, contains('[CherryPick] Test info'));
-      //xpect(log.level, TalkerLogLevel.info);
+      expect(log.message, contains('[request][CherryPick] A — String (scope: test)'));
     });
 
-    test('logs warning messages correctly', () {
-      logger.warn('Danger!');
+    test('onCycleDetected logs warning', () {
+      observer.onCycleDetected(['A', 'B'], scopeName: 's');
       final log = talker.history.last;
-      expect(log.message, contains('[CherryPick] Danger!'));
+      expect(log.message, contains('[cycle][CherryPick] Detected'));
       //expect(log.level, TalkerLogLevel.warning);
     });
 
-    test('logs error messages correctly', () {
-      final error = Exception('some error');
+    test('onError calls handle', () {
+      final error = Exception('fail');
       final stack = StackTrace.current;
-      logger.error('ERR', error, stack);
+      observer.onError('Oops', error, stack);
       final log = talker.history.last;
-      //expect(log.level, TalkerLogLevel.error);
-      expect(log.message, contains('[CherryPick] ERR'));
+      expect(log.message, contains('[error][CherryPick] Oops'));
       expect(log.exception, error);
       expect(log.stackTrace, stack);
     });
+
+    test('onDiagnostic logs verbose', () {
+      observer.onDiagnostic('hello', details: 123);
+      final log = talker.history.last;
+      //expect(log.level, TalkerLogLevel.verbose);
+      expect(log.message, contains('hello'));
+      expect(log.message, contains('123'));
+    });
   });
 }