fix NamespacesExampleTest: Refactor headerValueEncode to use toText for string conversion

[christiangoerdes]

Summary by CodeRabbit

• New Features

  • Added NullPolicies, a new policy implementation for the LLM gateway interceptor that provides no-op request handling and token management.

• Improvements

  • Enhanced HTTP header safety by properly escaping carriage returns, line feeds, and null characters in serialized header values to prevent protocol violations.

• Chores

  • Added Apache License 2.0 copyright headers to multiple source and test files for proper licensing compliance.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR extends the LLM gateway with a new NullPolicies no-op implementation, adds Apache 2.0 license headers to five Java source files for compliance, and improves HTTP header encoding safety in SerializationUtil by using ToTextSerializer.toText before escaping control characters.

Changes

LLM Gateway Extension and Serialization Improvements

Layer / File(s)	Summary
NullPolicies implementation with license header core/src/main/java/com/predic8/membrane/core/interceptor/llmgateway/NullPolicies.java	New public class implementing Policies interface with no-op request handling always returning Outcome.CONTINUE, zero max output tokens, and no-op initialization and setter methods.
Apache 2.0 license headers for related source files core/src/main/java/com/predic8/membrane/core/interceptor/llmgateway/Policies.java, core/src/main/java/com/predic8/membrane/core/interceptor/llmgateway/SystemPrompt.java, core/src/test/java/com/predic8/membrane/core/interceptor/llmgateway/provider/AbstractLLMRequestTest.java, core/src/test/java/com/predic8/membrane/core/lang/ScriptingUtilsTest.java	Apache 2.0 copyright and license header blocks added to four related source files for licensing compliance.
SerializationUtil header encoding with ToTextSerializer core/src/main/java/com/predic8/membrane/core/util/text/SerializationUtil.java	Static import of ToTextSerializer.toText added; headerValueEncode method now safely converts values using toText before escaping CR, LF, and NUL characters for HTTP header safety.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Suggested reviewers

• t-burch
• rrayst

Poem

A rabbit hops through code so clean,
With license headers, now pristine,
NullPolicies sleeps, passing requests by,
While headers dance safe—no CR, LF, or sigh! 🐰✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The PR title references fixing 'NamespacesExampleTest' and refactoring 'headerValueEncode', which matches the actual changes in SerializationUtil.java, but the changes include multiple unrelated additions like NullPolicies class and license headers.	The title describes only one specific change (headerValueEncode refactoring) but the PR includes several other changes (NullPolicies implementation and license headers). Clarify whether the PR should focus on the headerValueEncode fix or provide a broader title encompassing all changes.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-namespaces-example-test

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[membrane-ci-server]

This pull request needs "/ok-to-test" from an authorized committer.

[christiangoerdes]

/ok-to-test