[Rimus0cod]

Goal

Start decomposing app/services/async_scraper.py into source-specific modules without changing scraper behavior.

Changes

• moved ScrapedListing to app/scraper/models.py
• added app/scraper/sources/ package
• extracted ALO list-page/card parsing to AloSourceParser
• extracted ALO detail enrichment and ALO-specific extractors
• delegated BaseScraper ALO behavior to the new source module
• updated internal ScrapedListing imports to the new model module
• kept generic and Imoti behavior in place for later source-specific PRs
• added offline ALO regression tests for list parsing, dedup/filtering, and detail enrichment
• added the ALO regression test to CI

Validation — CI run #36

• Ruff: pass
• Ruff format check: pass
• ALO parser regression tests: pass
• MyPy strict: pass
• TypeScript check: pass
• Vite production build: pass
• Docker image build: pass

Refactor rule

This PR intentionally moves one source only. HTTP/retry/generic parsing behavior is unchanged so the migration remains small and reviewable.

Next source after merge: imoti.bg.