DRY ingests

[sanchitram1]

• ruff
• DRY ingests and centralize setting URLs

[jhheider]

DRY always good.

[Copilot]

Pull Request Overview

This PR removes duplicated ingest logic from pkgx and Homebrew modules, centralizes URL-loading routines in core/db.py, and aligns function signatures and test code accordingly.

• Extracts URL building into _build_current_urls with current_urls and all_current_urls helpers in core/db.py
• Removes bespoke ingest and manual URL-fetch implementations in package_managers/pkgx/db.py and package_managers/homebrew/db.py
• Updates pipeline calls in pkgx/main.py and homebrew/main.py to match reordered parameters
• Cleans up a test in test_pkgx_diff.py to use next(iter(...)) for key retrieval

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/package_managers/pkgx/test_pkgx_diff.py	Switched from list(keys)[0] to next(iter(keys))
package_managers/pkgx/main.py	Reordered run_pipeline arguments
package_managers/pkgx/db.py	Removed custom set_current_urls and ingest, now calls core helper
package_managers/homebrew/main.py	Reordered main arguments
package_managers/homebrew/db.py	Removed custom ingest, delegates URL-loading to core
core/db.py	Added _build_current_urls, current_urls, and all_current_urls