ci: match the environment with internal ones for pyink/isort/unittest

Previously submitted change is causing [Pyink error](https://github.com/google/adk-python/actions/runs/21884351396/job/63176122118) in repo because Pyink recently updated to 25.12.0.

Co-authored-by: Liang Wu <wuliang@google.com>
PiperOrigin-RevId: 868806575

src/google/adk/cli/adk_web_server.py

@@ -771,7 +771,9 @@ class AdkWebServer:
       return {
           "version": __version__,
           "language": "python",
-          "language_version": f"{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}",
+          "language_version": (
+              f"{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}"
+          ),
       }
 
     @app.get("/list-apps")

src/google/adk/cli/built_in_agents/__init__.py

@@ -18,6 +18,7 @@ This package provides an intelligent assistant for building multi-agent systems
 using YAML configurations. It can be used directly as an agent or integrated
 with ADK tools and web interfaces.
 """
+
 from __future__ import annotations
 
 from . import agent  # Import to make agent.root_agent available

src/google/adk/cli/built_in_agents/adk_agent_builder_assistant.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Agent factory for creating Agent Builder Assistant with embedded schema."""
+
 from __future__ import annotations
 
 from pathlib import Path

src/google/adk/cli/built_in_agents/agent.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Agent Builder Assistant instance for ADK web testing."""
+
 from __future__ import annotations
 
 from .adk_agent_builder_assistant import AgentBuilderAssistant

src/google/adk/cli/built_in_agents/sub_agents/__init__.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Sub-agents for Agent Builder Assistant."""
+
 from __future__ import annotations
 
 from .google_search_agent import create_google_search_agent

src/google/adk/cli/built_in_agents/sub_agents/google_search_agent.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Sub-agent for Google Search functionality."""
+
 from __future__ import annotations
 
 from google.adk.agents import LlmAgent

src/google/adk/cli/built_in_agents/sub_agents/url_context_agent.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Sub-agent for URL context fetching functionality."""
+
 from __future__ import annotations
 
 from google.adk.agents import LlmAgent

src/google/adk/cli/built_in_agents/tools/__init__.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Tools for Agent Builder Assistant."""
+
 from __future__ import annotations
 
 from .cleanup_unused_files import cleanup_unused_files

src/google/adk/cli/built_in_agents/tools/delete_files.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """File deletion tool for Agent Builder Assistant."""
+
 from __future__ import annotations
 
 from datetime import datetime

src/google/adk/cli/built_in_agents/tools/explore_project.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Project explorer tool for analyzing structure and suggesting file paths."""
+
 from __future__ import annotations
 
 from pathlib import Path

src/google/adk/cli/built_in_agents/tools/query_schema.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """ADK AgentConfig schema query tool for dynamic schema information access."""
+
 from __future__ import annotations
 
 from typing import Any

src/google/adk/cli/built_in_agents/tools/read_config_files.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Configuration file reader tool for existing YAML configs."""
+
 from __future__ import annotations
 
 from pathlib import Path

src/google/adk/cli/built_in_agents/tools/read_files.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """File reading tool for Agent Builder Assistant."""
+
 from __future__ import annotations
 
 from pathlib import Path

src/google/adk/cli/built_in_agents/tools/search_adk_knowledge.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """ADK knowledge search tool."""
+
 from __future__ import annotations
 
 from typing import Any

src/google/adk/cli/built_in_agents/tools/search_adk_source.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """ADK source code search tool for Agent Builder Assistant."""
+
 from __future__ import annotations
 
 from pathlib import Path

src/google/adk/cli/built_in_agents/tools/write_files.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """File writing tool for Agent Builder Assistant."""
+
 from __future__ import annotations
 
 from datetime import datetime

src/google/adk/cli/built_in_agents/utils/__init__.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Utility modules for Agent Builder Assistant."""
+
 from __future__ import annotations
 
 from .adk_source_utils import find_adk_source_folder

src/google/adk/cli/built_in_agents/utils/adk_source_utils.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Utilities for finding ADK source folder dynamically and loading schema."""
+
 from __future__ import annotations
 
 import json

src/google/adk/cli/built_in_agents/utils/resolve_root_directory.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 """Working directory helper tool to resolve path context issues."""
+
 from __future__ import annotations
 
 import os

src/google/adk/cli/utils/local_storage.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """Utilities for local .adk folder persistence."""
+
 from __future__ import annotations
 
 import asyncio