Auto-assign Copilot to next- issues generated from weekly run, and add fix-pyright skill

[JennyPng]

core:

• experiment: auto assign gh copilot to create a PR for any detected next-* issues generated from the weekly pipeline
• checks for existing open PRs tied to the issue, only assigns copilot if none exist
• reassigns Copilot to an existing issue if the version of the check mentioned was updated
• assigns copilot by querying for its bot node ID dynamically - did this because I think it could change if the agent session ever gets restarted ....? it's just unclear if this ID may change or not
  • using a GraphQL endpoint because it's better documented for this purpose than assigning through Rest (related thread)
• expects gh copilot to leverage fix-* skills for all the next- checks

misc.

• adds a fix-pyright skill which matches existing skills for fixing pylint, sphinx, black, mypy. Makes minor updates to other fix- skills based on feedback received here
• removes a mention of ruff that was previously missed, since we removed it entirely from the repo

tests:

• azure-appconfiguration-provider needs linting updates for pylint version 4.0.4 #46388
  • this pipeline run auto-assigned copilot which created this PR: fix(azure-appconfiguration-provider): remove unused import for pylint 4.0.4 compatibility #46727
• azure-health-deidentification needs linting updates for pylint version 4.0.4 #44754
  • this pipeline run auto-assigned copilot which created PRs:
    • fix(azure-health-deidentification): resolve pylint 4.0.4 compatibility issues #46741 for pylint
    • Fix pyright 1.1.407 typing errors in azure-health-deidentification #46742 for pyright
• example of it finding an open PR and skipping assigning copilot: https://dev.azure.com/azure-sdk/internal/_build/results?buildId=6254311&view=logs&j=87f850b5-cf15-53c6-370a-4be21ee70ec7&t=b33d1587-3539-5735-af43-e3e62f02ca4b

[Copilot]

Pull request overview

This PR extends the eng/tools/azure-sdk-tools vnext issue automation to optionally auto-assign the Copilot coding agent for eligible next-* issues (with duplicate PR detection and version-bump retriggering), and adds a new fix-pyright skill to align with existing fix-* skills.

Changes:

• Add Copilot auto-fix helpers to vnext issue creation/update flow (labels, instruction block upsert, duplicate PR detection, GraphQL assignment, and optional force-reassign on version change).
• Add unit tests covering eligibility, duplicate PR detection, instruction generation, label reconciliation, and assignment flows.
• Add fix-pyright skill documentation and update engineering docs (including removing the outdated Ruff row).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
eng/tools/azure-sdk-tools/tests/test_vnext_auto_fix.py	Adds tests for Copilot auto-fix helpers and integration behavior.
eng/tools/azure-sdk-tools/gh_tools/vnext_issue_creator.py	Implements Copilot auto-fix logic (instructions/labels/assignment) and updates some type signatures and mgmt labeling heuristic.
doc/eng_sys_checks.md	Documents the Copilot auto-fix behavior for weekly next-* checks.
doc/analyze_check_versions.md	Removes the Ruff row from the checker version table.
.github/skills/fix-pyright/SKILL.md	Introduces a new skill guide for fixing pyright issues, consistent with other fix-* skills.