Switch to Ruff

[tuomas777]

This PR introduces Ruff as the new linter and formatter, replacing the previously used tools: Black, Flake8, and isort. The goal is also to standardize the linting and formatting rules across all of our backend projects.

One key change to linting/formatting rules is the reduction of the linter maximum line length from 120 to 88 characters. Consequently, hundreds of lines exceeding the new limit are marked with # noqa: E501 to prevent linting errors. These comments can be removed gradually as the codebase is updated to comply with the new standard.

The PR includes a significant number of modified lines, primarily due to automatic formatting by Ruff. Reviewers can safely skip the following commits during manual review, as they involve safe automatic formatting:

• 0a0b506
• 0a16d94

Some automatic changes made by Ruff and autopep8 (which was run to help fix excessively long lines) may require some manual inspection, as they could be potentially unsafe:

• 46665ca
• 4d206c8

After the review and before merging, the plan is to squash commits for a cleaner history, perhaps combining the current chore commits into one and the style commits into another (which can then be added to .git-blame-ignore-revs).

Update: Added some new rules to Ruff lint config:

• flake8-bugbear (excluding opinionated rules 9xx) and pep8-naming: these are in use with Flake8 in many of our projects, so let's keep using them
• flake8-print and flake8-pie: these are pretty trivial to add

New commits start from cc32264

Refs LINK-2201

[terovirtanen]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1005.api.dev.hel.ninja 🚀🚀🚀

[terovirtanen]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1005.api.dev.hel.ninja 🚀🚀🚀

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.23810% with 12 lines in your changes missing coverage. Please review.

Project coverage is 91.32%. Comparing base (ea21c23) to head (90f934d).

Files with missing lines	Patch %	Lines
events/schema.py	91.46%	7 Missing ⚠️
events/importer/enkora.py	0.00%	2 Missing ⚠️
events/exporter/city_sdk.py	0.00%	1 Missing ⚠️
...vents/management/commands/add_helsinki_audience.py	0.00%	1 Missing ⚠️
.../management/commands/populate_local_event_cache.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1005      +/-   ##
==========================================
+ Coverage   91.29%   91.32%   +0.02%     
==========================================
  Files         405      405              
  Lines       38730    38711      -19     
==========================================
- Hits        35357    35351       -6     
+ Misses       3373     3360      -13     

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[terovirtanen]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1005.api.dev.hel.ninja 🚀🚀🚀

[terovirtanen]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1005.api.dev.hel.ninja 🚀🚀🚀

[danipran]

LGTM, left a question about mccabe

[terovirtanen]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1005.api.dev.hel.ninja 🚀🚀🚀

[danipran]

LGTM! 👍

[terovirtanen]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1005.api.dev.hel.ninja 🚀🚀🚀

[terovirtanen]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1005.api.dev.hel.ninja 🚀🚀🚀

[sonarcloud]

Quality Gate passed

Issues
0 New issues
1 Accepted issue

Measures
0 Security Hotspots
83.3% Coverage on New Code
0.1% Duplication on New Code

See analysis details on SonarCloud

[terovirtanen]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1005.api.dev.hel.ninja 🚀🚀🚀