⚠️ SECURITY-#6: Update vulnerable dependencies

[FernandoCelmer]

Description

Update 4 packages with known security vulnerabilities across all requirements.txt files:

Package	From	To	Severity	CVE
h11	0.14.0	0.16.0	Critical	Malformed Chunked-Encoding body acceptance
urllib3	2.3.0–2.4.0	2.6.3	High	Decompression bombs, unbounded chain, redirect issues
requests	2.32.3	2.33.1	Medium	Insecure temp file reuse, .netrc credential leak
Pygments	2.19.1	2.20.0	Low	ReDoS via GUID matching regex

Files Changed

• requirements.txt
• etl_flow/requirements.txt
• health_check_flow/requirements.txt
• server_flow/requirements.txt

Motivation and Context

Resolves 27 open Dependabot security alerts.

Closes #6

Types of changes

• Bug fix (change that fixes an issue)

Checklist

• I have performed a self-review of my own code
• All version bumps are to the latest patched releases