fix(OMN-12752): route terminal events for single handlers

[jonahgabriel]

Evidence-Source: OCC#2246
Evidence-Ticket: OMN-12752

Summary

• Publish a terminal event when a single local runtime handler returns a payload without downstream output events.
• Keep multi-handler routing behavior unchanged.
• Add runtime-local tests covering single-handler terminal publish and existing chained paths.

Verification

• uv run pytest tests/unit/runtime/test_runtime_local_execution.py tests/unit/runtime/test_handler_wiring_resolver_integration.py tests/unit/runtime/test_container_wiring.py -q -> 81 passed
• uv run ruff check src/omnibase_infra/runtime tests/unit/runtime/test_runtime_local_execution.py -> All checks passed
• git diff --check -> PASS

Worktree cleanup

• Worktree remains at /Users/jonah/Code/omni_home/omni_worktrees/OMN-12752/omnibase_infra pending PR merge and closeout.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR updates RuntimeLocal to explicitly resolve handler input topics and refines how terminal event output topics are selected. Handlers now receive computed input_topic values, and terminal wiring prefers a contract's terminal_event when it is present in configured publish_topics. A new integration test validates the behavior.

Changes

Handler input topic resolution and terminal event routing

Layer / File(s)	Summary
Input topic resolution and terminal output wiring src/omnibase_infra/runtime/runtime_local.py	Handler routing entries now compute input_topic via _resolve_handler_input_topic(...) with empty-string default. Terminal/terminal-reducer output wiring prefers the contract's terminal_event when present in publish_topics; otherwise falls back to publish_topics[0].
End-to-end test for handler terminal topic publishing tests/unit/runtime/test_runtime_local_execution.py	New test test_single_event_handler_publishes_result_to_terminal_topic validates a single-handler workflow publishes results to the terminal topic, injects in-memory modules, runs async execution, and asserts workflow completion with expected payload in workflow_result.json.

🎯 3 (Moderate) | ⏱️ ~20 minutes

🐰 Topics now resolve with care and grace,
Terminal events find their proper place,
Handler inputs flow through logic true,
A test confirms what routing will do! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 75.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly and specifically describes the main change: routing terminal events for single handlers, which matches the core functionality added in the pull request.
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ 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 jonah/omn-12752-runtime-local-terminal-output

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