Feat/plugins - deprecate otumate and old plugins

[dimitri-yatsenko]

Fixing #1252 and initial part of #1251

[Copilot]

Pull Request Overview

This PR removes deprecated plugin functionality from DataJoint, specifically deprecating the otumate library and associated plugin verification system. The changes simplify the codebase by removing cryptographic verification of plugins and the plugin loading mechanism.

Key changes:

• Removes the entire plugin verification system including cryptographic signature checking
• Eliminates dependencies on otumate and cryptography libraries
• Removes plugin-based connection handling and custom attribute adapters
• Adds comprehensive documentation for the three-part make pattern for long computations

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/test_plugin.py	Completely removes all plugin-related tests
pyproject.toml	Removes otumate and cryptography dependencies
docs/src/compute/populate.md	Adds extensive documentation for three-part make pattern
datajoint/plugin.py	Removes entire plugin module with verification logic
datajoint/errors.py	Simplifies DataJointError by removing plugin warning mechanism
datajoint/connection.py	Removes plugin-based connection hooks and simplifies connection logic
datajoint/attribute_adapter.py	Removes plugin-based attribute adapter loading
.devcontainer/devcontainer.json	Adds SSH agent mounting for development environment