feat(extract): tiered proxy with circuit breaker + proxy provider research

- playtomic_tenants.py: simplify proxy cycler call (cycler() instead of
  cycler["next_proxy"]()) — matches refactored proxy API
- docs/proxy-provider-inventory.md: proxy provider comparison table for
  Playtomic scraping (~14k req/day, residential IPs, pay-per-GB)
- .env.*.sops: updated encrypted secrets (re-encrypted)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

extract/padelnomics_extract/src/padelnomics_extract/playtomic_tenants.py

@@ -60,7 +60,7 @@ def extract(
 
     for page in range(MAX_PAGES):
         if cycler:
-            proxy = cycler["next_proxy"]()
+            proxy = cycler()
             if proxy:
                 session.proxies = {"http": proxy, "https": proxy}