feat(logging): improve event logging and add bot thinking display

[Pouyanpi]

Stack Info

This PR is part of a stack:

1. refactor!: drop reasoning trace extraction logic #1427
2. feat: add reasoning trace extraction from llm calls #1431
3. feat: emit BotThinking events with reasoning traces #1432
4. feat(logging): improve event logging and add bot thinking display #1434 (this PR)

⚠️ Depends on:

#1427 → #1431 → #1432

Description

Enhanced event logging in the runtime and callbacks to better display bot thinking events with reasoning traces. Moved event logging to occur after event generation for proper ordering, added reasoning content extraction from LLM completions, and improved console output formatting for different event types.

Changes

• nemoguardrails/colang/v1_0/runtime/runtime.py: Moved event logging to occur after events are generated to ensure proper logging order
• nemoguardrails/logging/callbacks.py: Extract and include reasoning_content from ChatGeneration messages in completion logs
• nemoguardrails/logging/verbose.py: Add special formatting for BotThinking events and improve action event display
• tests/test_runtime_event_logging.py: Add comprehensive tests for event logging behavior including BotThinking, BotMessage, ContextUpdate events and ordering

[codecov-commenter]

Codecov Report

❌ Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
nemoguardrails/logging/callbacks.py	88.88%	1 Missing ⚠️
nemoguardrails/logging/verbose.py	50.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[tgasser-nv]

Looks good, just a few small comments.

BEFORE MERGING: Could you run a local integration test with all the reasoning-models we claim to support? Copy-and-paste the output into the description as a test-plan. We need to check this new approach works with production models