feat(log): support logging prompt

[keyangds]

Closes #

📑 Description

✅ Checks

• [x] My pull request adheres to the code style of this project
• [x] My code requires changes to the documentation
• [x] I have updated the documentation as required
• [ ] All the tests have passed
• [ ] Branch name follows type/descript (e.g. feature/add-llm-agents)
• [ ] Ready for code review

ℹ Additional Information

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.69%. Comparing base (74a1795) to head (a740584). Report is 1 commits behind head on main.

@@            Coverage Diff             @@
##             main     #747      +/-   ##
==========================================
+ Coverage   87.59%   87.69%   +0.09%     
==========================================
  Files          60       60              
  Lines        2588     2608      +20     
==========================================
+ Hits         2267     2287      +20     
  Misses        321      321              

Files with missing lines	Coverage Δ
research_town/agents/agent.py	89.41% <100.00%> (+1.10%)	:arrow_up:
research_town/data/__init__.py	100.00% <ø> (ø)
research_town/data/data.py	100.00% <100.00%> (ø)
research_town/utils/agent_prompter.py	94.44% <100.00%> (ø)
research_town/utils/prompt_constructor.py	100.00% <ø> (ø)
tests/agents/test_agents.py	100.00% <ø> (ø)