refactor: replace black, isort and pylint with ruff

[hf-krechan]

Summary

• Replaces black, isort, and pylint with ruff across dev dependencies, config, pre-commit, and CI.
• pyproject.toml: merged the formatting (black/isort) and linting (pylint) dependency groups into one linting group holding just ruff==0.16.0; translated [tool.black]/[tool.isort]/[tool.pylint."MESSAGES CONTROL"] into [tool.ruff]/[tool.ruff.lint] (baseline select E, W, F, I, UP, B, N, PL, RUF; the usual PLR09xx ignores; extend-exclude = ["*.md"] since ruff format also reformats fenced code blocks in docs, unlike black).
• Deleted tests/.pylintrc and .pylintrc_autogen_code - their disables either have no ruff equivalent (R0801 duplicate-code, R0903 too-few-public-methods, W0621 redefined-outer-name, docstring rules we don't select) or were translated into a per-file-ignores entry for src/borm/models/** (F401, E501) mirroring the autogenerated-code rcfile.
• .pre-commit-config.yaml: swapped the psf/black + pycqa/isort hooks for astral-sh/ruff-pre-commit v0.16.0 (ruff-check --fix, ruff-format).
• CI: pythonlint.yml and the release workflow python-publish.yml (only runs on release: events, so it wouldn't have failed this PR - it had its own separate pylint invocation) now run ruff check src/borm tests, matching pylint's old combined scope exactly. formatting.yml's tool: ["black", "isort"] matrix is preserved via matrix.include, pairing each value with a real ruff command, plus an explicit job name: so the two required status checks (black (3.11, ubuntu-latest, black) / black (3.11, ubuntu-latest, isort), confirmed via the branch protection API) keep reporting under their old names.
• Fixed a real regression risk found along the way: both alembic.ini files (postgresql_db, mysql_db) had a post_write_hooks entry shelling out to black via the console_scripts runner to format autogenerated migration files. Since black is being removed entirely, the next alembic revision --autogenerate would have broken. Switched both to an exec-type hook calling ruff format (ruff has no console_scripts entry point, unlike black) - verified with a smoke test against a dummy revision file.
• README: badge alt-text referencing "Black" updated to "Formatting".
• Left the now-dead # pylint: disable=... comments in place (ruff never read them, and most have no ruff equivalent) rather than stripping them as a separate cosmetic cleanup.

Test plan

• ruff check src/borm tests (pylint's old scope) - clean
• ruff format --check . (black/isort's old scope) - clean
• ruff check --select I . (isort-equivalent) - clean
• uv.lock diff reviewed - only removes black/isort/pylint transitive deps, adds ruff, no unrelated churn
• Migration files and workflow YAML re-validated for syntax after ruff's autofixes
• alembic exec post-write hook smoke-tested against a dummy revision file
• Full mypy --strict / pytest intentionally not run locally (resource-constrained machine) - relying on CI

Tracking issue: #272

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR migrates the repository’s Python formatting/linting toolchain from Black/isort/pylint to Ruff, updating developer workflows (pre-commit), configuration, and CI so the same checks keep running under the new tool.

Changes:

• Replace Black/isort/pylint dependency groups and configs with ruff==0.16.0 and [tool.ruff] / [tool.ruff.lint] in pyproject.toml.
• Update pre-commit and CI workflows to run ruff check / ruff format instead of Black/isort/pylint (including preserving legacy required-check job names for branch protection).
• Update Alembic post-write hooks to format generated migrations via ruff format instead of black.

Reviewed changes

Copilot reviewed 17 out of 18 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
uv.lock	Removes direct dev dependency entries for black/isort/pylint and adds ruff; updates resolved lock contents accordingly.
tests/integrationtests/test_main.py	Applies import reordering consistent with new lint/format tooling.
tests/integrationtests/conftest.py	Updates Generator import to collections.abc style (Python 3.11+).
tests/.pylintrc	Removes pylint test configuration (pylint no longer used).
src/borm/db/postgresql_db/migrations/versions/9f7a0a61d21e_init.py	Applies typing modernizations consistent with Ruff/UP rules.
src/borm/db/postgresql_db/auxiliary.py	Replaces IOError with OSError for env-loading failure case.
src/borm/db/postgresql_db/alembic.ini	Switches Alembic post-write formatting hook from black to ruff format via exec hook.
src/borm/db/mysql_db/migrations/versions/d73a00baaa17_init.py	Applies typing modernizations consistent with Ruff/UP rules.
src/borm/db/mysql_db/auxiliary.py	Replaces IOError with OSError for env-loading failure case.
src/borm/db/mysql_db/alembic.ini	Switches Alembic post-write formatting hook from black to ruff format via exec hook.
src/borm/db/base_class.py	Minor formatting-only change.
README.md	Updates badge alt-text from “Black” to “Formatting”.
pyproject.toml	Replaces black/isort/pylint config and dependency groups with Ruff configuration and a unified linting group.
.pylintrc_autogen_code	Removes pylint configuration for autogenerated code (pylint no longer used).
.pre-commit-config.yaml	Replaces Black/isort hooks with Ruff check/format hooks.
.github/workflows/pythonlint.yml	Updates CI lint step to run ruff check instead of pylint.
.github/workflows/python-publish.yml	Updates release workflow lint step to run ruff check instead of pylint.
.github/workflows/formatting.yml	Keeps legacy required-check naming while mapping “black/isort” matrix entries to Ruff commands.

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