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Pull Request Overview

This PR integrates upstream branch verification directly into Python Semantic Release, eliminating the need for external shell scripts in CI/CD workflows. The implementation adds a new verify_upstream_unchanged() method that checks if the upstream branch has changed before pushing commits, preventing push conflicts when multiple developers are working on the same branch.

• Adds new error types for handling upstream verification failures
• Implements upstream verification logic in the GitProject class
• Integrates verification into the version command before pushing changes
• Updates documentation to reflect the new built-in verification

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/semantic_release/errors.py	Adds three new error classes for upstream verification failures
src/semantic_release/gitproject.py	Implements the verify_upstream_unchanged() method with upstream branch verification logic
src/semantic_release/cli/commands/version.py	Integrates upstream verification check before pushing changes
tests/unit/semantic_release/test_gitproject.py	Adds comprehensive unit tests for the new verification method
tests/e2e/cmd_version/test_version_upstream_check.py	Adds end-to-end tests for upstream verification scenarios
docs/configuration/automatic-releases/github-actions.rst	Removes manual upstream verification step from documentation and adds note about built-in verification
docs/configuration/configuration-guides/uv_integration.rst	Removes manual upstream verification script reference
docs/api/commands.rst	Documents the new automatic upstream verification behavior

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