Replace isort with ruff

[rowanseymour]

Summary

• Remove isort dependency and use ruff's built-in import sorting (I rule) instead
• Add [tool.ruff.lint.isort] config with combine-as-imports and known-first-party
• Remove separate isort CI step (now covered by ruff check)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.79%. Comparing base (53e909c) to head (b6ee49c).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #123   +/-   ##
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  Coverage   99.79%   99.79%           
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  Files           9        9           
  Lines        1443     1443           
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  Hits         1440     1440           
  Misses          3        3           

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[Copilot]

Pull request overview

This PR updates the project’s Python tooling to remove isort and rely on Ruff’s import-sorting lint rule (I) for enforcing import order in the temba_client package.

Changes:

• Removes isort from dev dependencies and uv.lock.
• Enables Ruff’s import-sorting rule (I) and adds [tool.ruff.lint.isort] configuration.
• Removes the dedicated isort CI step (import sorting is now checked via ruff check).

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
uv.lock	Drops the locked isort package and removes it from dev dependency metadata.
pyproject.toml	Removes [tool.isort], enables Ruff’s I rule, and adds Ruff isort-lint configuration.
.github/workflows/ci.yml	Removes the separate isort CI step, relying on Ruff instead.

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[Copilot]

pyproject.toml sets tool.ruff.fix = true, which causes ruff check to run in fix mode by default. In CI this can auto-modify the working tree and still succeed, which may allow lint/import-order issues to slip through without failing the job. Consider running ruff check --no-fix (or adding --exit-non-zero-on-fix) so CI fails when fixes would be applied.

Suggested change

	run: uv run ruff check temba_client
	run: uv run ruff check --no-fix temba_client

[Copilot]

The prior [tool.isort] config set wrapping/formatting options (e.g., multi_line_output, include_trailing_comma, line_length). The new [tool.ruff.lint.isort] table only sets combine-as-imports and known-first-party, so Ruff will fall back to its defaults for the rest, which can change import formatting/order compared to what was previously enforced. Consider porting the relevant isort options to Ruff equivalents (or running ruff check --fix once and committing any resulting import reformat) to avoid unexpected churn later.

Suggested change

	known-first-party = ["temba_client"]
	known-first-party = ["temba_client"]
	split-on-trailing-comma = true