fix(security): add litellm supply chain attack detection (PYSEC-2026-2) (#2732)

Add litellm==1.82.7 and litellm==1.82.8 to pip_blacklist and remediation
guide in security_check.py to detect compromised packages that harvest
credentials and exfiltrate via attacker-controlled server.

Also fixes two pre-existing issues in pip_blacklist scanning:
- Remove `break` that caused only the first blacklist match to be
  detected, missing additional threats in multi-infection scenarios
- Replace substring matching with set-based exact matching to prevent
  false positives on similar version strings (e.g. 1.82.70 vs 1.82.7)

Bump version to 4.1.

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "comfyui-manager"
 license = { text = "GPL-3.0-only" }
-version = "4.1b8"
+version = "4.1"
 requires-python = ">= 3.9"
 description = "ComfyUI-Manager provides features to install and manage custom nodes for ComfyUI, as well as various functionalities to assist with ComfyUI."
 readme = "README.md"