Refactor scripting components and add Portainer deployment workflow

[mrMigles]

Summary

• add structured script registry/context factory and improve compiler logging
• replace ad-hoc stdout usage with SLF4J and extend test coverage for scripting utilities
• document and configure GitHub Actions workflow to build and deploy to Portainer

Testing

• mvn test (fails: dependency resolution blocked for spring-boot-starter-parent)

---

Codex Task

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Fix impossible ScriptCompiler error expectations

compileShouldWrapGroovyErrors asks the exception message to both equal "Unable to compile script" and also contain "badMethod". A string cannot satisfy both matchers at once, so this test will fail every run even if the compiler correctly wraps Groovy errors, breaking the suite. Align the expected message (or the thrown text) so the matchers are consistent.

Useful? React with 👍 / 👎.