release: prepare ExcelAlchemy 2.2.3

[ruicore]

Summary

This PR prepares the 2.2.3 release of ExcelAlchemy.

It continues the stable 2.x line with a focused validation fix in the Pydantic adapter layer, while keeping the public import/export workflow API stable.

What changed

Validation fix

• restore explicit ProgrammaticError handling for unsupported annotated declarations that use native Python types instead of ExcelFieldCodec subclasses
• tighten codec resolution in the Pydantic adapter so unsupported declarations fail at the codec resolution boundary instead of being treated as valid runtime metadata
• preserve existing behavior for valid ExcelFieldCodec and CompositeExcelFieldCodec declarations

Regression coverage

• add an integration regression test for unsupported annotated declarations
• verify that native Python annotations paired with ExcelMeta(...) do not silently enter the workbook schema path

Release prep

• add the 2.2.3 changelog entry
• add docs/releases/2.2.3.md
• mark 2.2.2 as a dated release in the changelog

Compatibility notes

• no public import/export workflow API was removed
• valid codec-based declarations continue to work unchanged
• unsupported native annotations with ExcelMeta(...) now fail early with the intended ProgrammaticError

Verification

• ./.venv/bin/ruff check src/excelalchemy/helper/pydantic.py tests/integration/test_excelalchemy_workflows.py
• ./.venv/bin/uv run pyright
• ./.venv/bin/pytest tests/integration/test_excelalchemy_workflows.py -q

Release intent

After merge, this branch is intended to be tagged and published as:

• v2.2.3

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.56%. Comparing base (0a9f9ea) to head (9533324).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/excelalchemy/helper/pydantic.py	77.77%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #62      +/-   ##
==========================================
- Coverage   86.60%   86.56%   -0.04%     
==========================================
  Files          48       48              
  Lines        3306     3313       +7     
  Branches      375      377       +2     
==========================================
+ Hits         2863     2868       +5     
- Misses        276      277       +1     
- Partials      167      168       +1     

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