Refactor get_address_info to return structured response

[akolotov]

Summary

• add AddressInfoData to models
• return ToolResponse[AddressInfoData] from get_address_info
• update unit tests for new return type
• update integration tests for structured response

Closes #74

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https://chatgpt.com/codex/tasks/task_b_685c6870eed88323b13be15031bbaeb8

[Copilot]

Pull Request Overview

This PR refactors get_address_info to return a structured ToolResponse[AddressInfoData] instead of a plaintext string, and updates the models and tests accordingly.

• Introduce AddressInfoData and update get_address_info to build and return a ToolResponse.
• Update unit tests (test_address_tools.py, test_models.py) to assert on the new return type and fields.
• Update integration test (test_address_tools_integration.py) to handle and validate the structured response.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
blockscout_mcp_server/models.py	Add AddressInfoData model for structured address payload.
blockscout_mcp_server/tools/address_tools.py	Change get_address_info to return ToolResponse[AddressInfoData] via build_tool_response.
tests/tools/test_address_tools.py	Update unit tests to assert on ToolResponse and AddressInfoData.
tests/test_models.py	Add tests for the new AddressInfoData model.
tests/integration/test_address_tools_integration.py	Update integration test to validate structured response.

Comments suppressed due to low confidence (1)

tests/tools/test_address_tools.py:465

• Add a unit test covering the case where the metadata API returns an addresses map that does not include the queried address key. Verify that result.data.metadata is None and result.notes remains None.

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