refactor: convert single-use 1-3 line helper functions to inline expr…

[ekrama040-byte]

Description

Streamlined the codebase by identifying small, single-use utility functions (1-3 lines long) across the repository and refactoring them directly inline to optimize structural overhead.

Key Changes

• Inlined is_metta_test and output_tail in scripts/run-tests.py.
• Inlined evaluateBaseline in evaluate_trading.py.
• Inlined _clamp11 in context_parser.py.
• Optimized execution_instruction directly inside the behavioral prompt f-string block inside llm/conversation.py.

Verification

Verified that all files successfully pass python syntax compilation checks via py_compile.

[Nahom32]

@ekrama040-byte I told you to use this format: https://github.com/trueagi-io/PeTTa/blob/ae66fa8e41dcd5539d614706bd4e5cfb34f9608d/examples/forall.metta#L64 . I didn't want you to write lambda expressions for the python implementation.