[I] environment / update environment & requirements

- Updated the following packages:
  - langgraph to 0.2.70
  - langgraph-checkpoint to 2.0.12

Closes #615

[E-1] 17-LangGraph / 01-Core-Features / 01-LangGraph-Introduction (#499)

[N-1] 01-SQL / 02-SpeechToSQL (#425)

[I] environment / update environment & requirements

- Added new environment lock and configuration files.
- Updated existing dependency management files for consistency and compatibility.

[Poetry Package] Poetry Python Package Update (#147)