* feat(planning): enhance planning configuration and observation handling
- Introduced attribute in to control LLM calls after each step.
- Updated to set default to 1 when planning is enabled without explicit config.
- Modified to support heuristic observations when LLM calls are disabled.
- Adjusted to respect and settings for step observations.
- Added tests to verify behavior of new configurations and ensure correct observation handling across different reasoning efforts.
* fix(agent_executor): update handling of failed steps in low effort mode
- Adjusted logic to ensure that failed steps are recorded without marking them as completed when using low reasoning effort.
- Introduced feedback for failed steps, allowing the process to continue while tracking failures.
- Added a test to verify that failed steps are correctly marked without triggering a replan.
- And linted
* linted
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