Consolidate error message constants into ErrorMsg class

[liudger]

This pull request refactors how error messages are managed and referenced throughout the bsblan codebase. Instead of using individual string constants for each error message, all error messages are now encapsulated in a new ErrorMsg class. All code that previously referenced the old constants has been updated to use the new class attributes, improving maintainability and consistency.

Key changes include:

Error Message Refactoring:

• Introduced a new ErrorMsg class in constants.py to centralize all error message strings, replacing the previous pattern of individual error message constants.
• Updated all references in bsblan.py to use ErrorMsg.<ATTRIBUTE> instead of the old error message constants, ensuring consistent error handling throughout the codebase. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24]

Test Updates:

• Modified tests to reference the new ErrorMsg class attributes instead of the old error message constants, ensuring tests remain valid and up to date. [1] [2] [3]

This refactor improves code clarity and makes it easier to manage and update error messages in the future.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.89%. Comparing base (4d129f5) to head (f4555c3).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

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##             main    #1432   +/-   ##
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  Coverage   99.89%   99.89%           
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  Files           6        6           
  Lines         986      987    +1     
  Branches      139      139           
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+ Hits          985      986    +1     
  Partials        1        1           

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Pull request overview

This PR refactors error-message handling in the bsblan async client by consolidating scattered error message string constants into a single ErrorMsg namespace and updating call sites accordingly, aiming to improve consistency and maintainability.

Changes:

• Introduces ErrorMsg in src/bsblan/constants.py and migrates existing error message strings into class attributes.
• Updates src/bsblan/bsblan.py to raise errors using ErrorMsg.<NAME> instead of *_ERROR_MSG constants.
• Updates multiple tests to reference ErrorMsg so assertions continue to validate the correct error messages.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/bsblan/constants.py	Replaces module-level error message constants with the new ErrorMsg class.
src/bsblan/bsblan.py	Updates all internal error raising to use ErrorMsg attributes.
tests/test_version_errors.py	Updates version-related error assertions to use ErrorMsg.
tests/test_thermostat.py	Updates multi-parameter error assertion to use ErrorMsg.
tests/test_temperature_validation.py	Updates temperature-range error assertion to use ErrorMsg.
tests/test_set_hotwater.py	Updates hot water validation error assertions to use ErrorMsg.
tests/test_initialization.py	Updates API-version error assertion to use ErrorMsg.
tests/test_include_parameter.py	Updates include-list validation assertions to use ErrorMsg.
tests/test_dhw_time_switch.py	Updates multi-parameter error assertion to use ErrorMsg.
tests/test_configuration.py	Updates _validate_single_parameter error assertions to use ErrorMsg.
tests/test_circuit.py	Updates multi-parameter error assertion to use ErrorMsg.
tests/test_bsblan_edge_cases.py	Updates API-data-not-initialized error assertion to use ErrorMsg.
tests/test_api_validation.py	Updates validator/data-not-initialized error assertions to use ErrorMsg.
tests/test_api_initialization.py	Updates API-version error assertion to use ErrorMsg.

[Copilot]

Replacing the module-level *_ERROR_MSG constants with ErrorMsg is a breaking API change for any downstream code importing those names from bsblan.constants. Consider keeping backward-compatible aliases (e.g., NO_STATE_ERROR_MSG = ErrorMsg.NO_STATE, etc.) and deprecating them over at least one release cycle to avoid unexpected runtime ImportErrors.