merge: tiered-proxy-tenants — gisco extractor, proxy fixes, recheck datetime fix

- feat: GISCO NUTS-2 extractor module (replaces standalone script)
- feat: wire 5 unscheduled extractors into workflows.toml
- fix: add load_dotenv() to _shared.py so .env proxies are picked up
- fix: recheck datetime parsing (HH:MM:SS slot times need start_date prefix)
- fix: graceful 0-venue early return in recheck
- fix(proxy): remove Webshare free tier — DC tier 1, residential tier 2

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

extract/padelnomics_extract/src/padelnomics_extract/proxy.py

@@ -3,10 +3,9 @@
 Proxies are configured via environment variables. When unset, all functions
 return None/no-op — extractors fall back to direct requests.
 
-Three-tier escalation: free → datacenter → residential.
-  Tier 1 (free):        WEBSHARE_DOWNLOAD_URL — auto-fetched from Webshare API
-  Tier 2 (datacenter):  PROXY_URLS_DATACENTER  — comma-separated paid DC proxies
-  Tier 3 (residential): PROXY_URLS_RESIDENTIAL — comma-separated paid residential proxies
+Two-tier escalation: datacenter → residential.
+  Tier 1 (datacenter):  PROXY_URLS_DATACENTER  — comma-separated paid DC proxies
+  Tier 2 (residential): PROXY_URLS_RESIDENTIAL — comma-separated paid residential proxies
 
 Tiered circuit breaker:
   Active tier is used until consecutive failures >= threshold, then escalates
@@ -69,22 +68,15 @@ def fetch_webshare_proxies(download_url: str, max_proxies: int = MAX_WEBSHARE_PR
 
 
 def load_proxy_tiers() -> list[list[str]]:
-    """Assemble proxy tiers in escalation order: free → datacenter → residential.
+    """Assemble proxy tiers in escalation order: datacenter → residential.
 
-    Tier 1 (free):        fetched from WEBSHARE_DOWNLOAD_URL if set.
-    Tier 2 (datacenter):  PROXY_URLS_DATACENTER (comma-separated).
-    Tier 3 (residential): PROXY_URLS_RESIDENTIAL (comma-separated).
+    Tier 1 (datacenter):  PROXY_URLS_DATACENTER (comma-separated).
+    Tier 2 (residential): PROXY_URLS_RESIDENTIAL (comma-separated).
 
     Empty tiers are omitted. Returns [] if no proxies configured anywhere.
     """
     tiers: list[list[str]] = []
 
-    webshare_url = os.environ.get("WEBSHARE_DOWNLOAD_URL", "").strip()
-    if webshare_url:
-        free_proxies = fetch_webshare_proxies(webshare_url)
-        if free_proxies:
-            tiers.append(free_proxies)
-
     for var in ("PROXY_URLS_DATACENTER", "PROXY_URLS_RESIDENTIAL"):
         raw = os.environ.get(var, "")
         urls = [u.strip() for u in raw.split(",") if u.strip()]