refactor: move imports into type checking sections

[AlessandroPomponio]

Checked with ruff check --select TC

[DRL-NextGen]

Checks Summary

Last run: 2026-01-23T17:17:22.526Z

Code Risk Analyzer vulnerability scan found 1 vulnerabilities:

Severity	Identifier	Package	Details	Fix
◻ Unknown	CVE-2025-53000	nbconvert	nbconvert has an uncontrolled search path that leads to unauthorized code execution on Windows GHSA-xm59-rqc7-hhvf nbconvert:7.16.6->ado-core:1.3.3	>7.16.6

Mend Unified Agent vulnerability scan found 2 vulnerabilities:

Severity	Identifier	Package	Details	Fix
❗ Critical	CVE-2025-56005	ply-3.11-py2.py3-none-any.whl	An undocumented and unsafe feature in the PLY (Python Lex-Yacc) library 3.11 allows Remote Code Exec... An undocumented and unsafe feature in the PLY (Python Lex-Yacc) library 3.11 allows Remote Code Execution (RCE) via the "picklefile" parameter in the "yacc()" function. This parameter accepts a ".pkl" file that is deserialized with "pickle.load()" without validation. Because "pickle" allows execution of embedded code via "reduce()", an attacker can achieve code execution by passing a malicious pickle file. The parameter is not mentioned in official documentation or the GitHub repository, yet it is active in the PyPI version. This introduces a stealthy backdoor and persistence risk.	Not Available
🔺 High	CVE-2025-53000	nbconvert-7.16.6-py3-none-any.whl	The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja... The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. Versions of nbconvert up to and including 7.16.6 on Windows have a vulnerability in which converting a notebook containing SVG output to a PDF results in unauthorized code execution. Specifically, a third party can create a "inkscape.bat" file that defines a Windows batch script, capable of arbitrary code execution. When a user runs "jupyter nbconvert --to pdf" on a notebook containing SVG output to a PDF on a Windows platform from this directory, the "inkscape.bat" file is run unexpectedly. As of time of publication, no known patches exist.	Not Available