Initial commit: App Store + Google Play scraper

- discover.py: find app IDs (Play search, iTunes Search API, RSS charts) -> apps.json
- scraper.py: fetch metadata + ratings per app/country, threaded, shardable, resumable
- netutil.py: shared retry/backoff + adaptive circuit breaker (rate-limit safe)
- merge_csv.py: combine sharded outputs from multiple machines
- ARCHITECTURE.html: full architecture & flow documentation
- english_words.txt: deep search-term wordlist

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,22 @@
+# Python
+__pycache__/
+*.py[cod]
+*.egg-info/
+.venv/
+venv/
+env/
+
+# Generated output (CSVs can get very large)
+output/
+*.log
+
+# Backups
+backups/
+apps_backup*.json
+
+# Local tool / editor config
+.claude/
+.vscode/
+.idea/
+*.swp
+.DS_Store