Regenerate lockfile and codegen outputs after upstream merge

- flutter pub get / dart pub get to refresh pubspec.lock
- dart run build_runner build to refresh json_serializable outputs
  (json_serializable was bumped by upstream)
- analysis_options.yaml auto-updated by tooling to exclude native dirs

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: lilit-san

analysis_options.yaml

@@ -33,6 +33,12 @@ analyzer:
     # Manager is enabled and this package ships Package.swift.
     - build/**
     - example/build/**
+    - android/**
+    - ios/**
+    - web/**
+    - windows/**
+    - macos/**
+    - linux/**
 
 linter:
   rules:

example/analysis_options.yaml

@@ -39,6 +39,13 @@ analyzer:
     - "**/*.pbenum.dart"
     - "**/*.pbjson.dart"
     - "**/*.pbserver.dart"
+    - build/**
+    - android/**
+    - ios/**
+    - web/**
+    - windows/**
+    - macos/**
+    - linux/**
 
 linter:
   rules: