fix: ensure compatibility with pandas>=2.0 by using SQLAlchemy Connection in read_sql

[Christos-Hadjinikolis]

Overview

• ✅ Extended Postgres Type Support: The _type_lookup now explicitly supports all relevant pandas and PostgreSQL types, including Int64, boolean, string, and JSONB, improving robustness and compatibility.

• ✅ Fixes COPY failures: Prevents silent data truncation or mismatched writes by ensuring pandas float64 is handled when writing to Int64 columns using Postgres COPY.

• ✅ Improved Error Transparency: _generate_model_from_schema now skips columns only if they lack a compatible mapping — consider extending to raise if critical fields are dropped.

• ✅ Improved pandas 2.x Compatibility: Replaced session.get_bind() with compiled SQL using sqlalchemy.text(...) for pandas ≥ 2.0.

• ✅ Cleaner Logging: Log messages for table reads now include database host and name for easier traceability.

• ✅ Tests Updated:

  • Migrated test assertions to use ReadOnlyColumnCollection (SQLAlchemy 2.x).
  • Added fallback mocks and a new GenericIO test schema to verify full mixin functionality.

• ✅ Pre-commit Fixes:

  • Corrected invalid regex in the exclude fields (e.g., demo/* → demo/.*).
  • Normalized hook stages from commit to pre-commit.
  • Ran pre-commit migrate-config and updated Makefile accordingly.

Checklist

The following won't apply in all cases - mark N/A next to point if not needed.

• Appropriate unit tests added/updated
• Module, function, class docstrings updated
• Comments added to PR where necessary
• Interface documentation updated
• Semantic commits used for this PR, so that a CHANGELOG can be generated from them (don't delete your local branch! when tagging a new release from master)
• Test RC candidate

Release-Steps

• Merge PR
• Release new tag

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.19%. Comparing base (e1f5c5f) to head (4bc566f).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
dynamicio/mixins/with_postgres.py	62.96%	9 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #90      +/-   ##
==========================================
- Coverage   88.21%   88.19%   -0.03%     
==========================================
  Files          16       16              
  Lines        1256     1262       +6     
  Branches      142      143       +1     
==========================================
+ Hits         1108     1113       +5     
- Misses        110      111       +1     
  Partials       38       38              

Flag	Coverage Δ
unittests	88.19% <66.66%> (-0.03%)	⬇️

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