[build] Trigger Python Distribution workflow on packaging file changes

Add pyproject.toml, setup.py, requirements*.txt, and uv.lock to the
pull_request and push path filters so CI runs when packaging config changes.

Author: Breakthrough

.github/workflows/build.yml

@@ -9,11 +9,19 @@ on:
       - dist/**
       - dvr_scan/**
       - tests/**
+      - pyproject.toml
+      - setup.py
+      - requirements*.txt
+      - uv.lock
   push:
     paths:
       - dist/**
       - dvr_scan/**
       - tests/**
+      - pyproject.toml
+      - setup.py
+      - requirements*.txt
+      - uv.lock
     branches:
       - main
       - release