update template, rework the plugin documentation and migrate to cmem-client

[seebi]

Three changes, one per commit.

update to cmem-plugin-template v9.5.0

Updates this repository to cmem-plugin-template v9.5.0 via copier update, and refreshes the locked dependencies that come with it.

rework the user facing plugin documentation

Rewrites the text a user reads inside Corporate Memory for both tasks, grounded in what the code actually does:

• Python Code workflow task: describes the ports, documents the test_inputs variable of the Validate execution phase action, and adds a Caveats section covering unsandboxed execution, initialization code running on every load, the ten-entity cap and context is None during validation, and the limits of dependency installation.
• Python Code transform operator: adds the missing task description, a working example and the caveats around scope, packages and repeated execution.
• Adds descriptions to the initialization code, execution code and source code parameters.
• Fixes the stale link to the context object documentation (it pointed at the 23.3 docs).

migrate to cmem-client

Removes the deprecated cmem-cmempy usage:

• install_missing_packages takes a Client and reads client.python_packages instead of cmem.cmempy.workspace.python.
• The workflow task builds its client with get_client(context) rather than calling setup_cmempy_user_access.
• Tests use Client.from_env(), and test_install_missing_packages_success gained a fixture which uninstalls example-pypi-package unconditionally before and after the test, so neither a leftover from an earlier run nor a failing test can leave it behind.
• cmem-cmempy is replaced by cmem-client in pyproject.toml.

This also fixes the Install missing dependencies action, which printed the package name where the installed version belongs, and the documentation no longer points at setup_cmempy_user_access.

Checks

task check passes locally against a live Corporate Memory deployment: ruff, mypy (9 source files), deptry and trivy clean, 12 tests passed.

[seebi]

Reviewer chosen automatically as part of the template-update sweep.

The main author of this plugin is Sebastian Tramp (62% of the commits touching cmem_plugin_*/ on the default branch), but they could not be assigned:

• Sebastian Tramp (62%) — opened this request and cannot review it.

So review falls to the next-highest contributor who can be assigned here: René Pietzsch (38% of those commits).

[seebi]

Taking this one as maintainer. I am the main author of this plugin (62% of the commits touching cmem_plugin_*/ on the default branch), so I will review and merge it myself.

GitHub does not allow requesting a review from the author of a pull request, so this is recorded as an assignment instead of a review request. The automatically chosen reviewer (@rpietzsch) has been removed from this pull request, since review falls to me.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
init.py	0	0	100%
package_management.py	19	0	100%
test_transform_operator.py	17	0	100%
workflow_task.py	109	0	100%
TOTAL	145	0	100%

Tests	Skipped	Failures	Errors	Time
12	0 💤	0 ❌	0 🔥	39.977 ⏱