fix(extract): default worker count to 200 when proxies configured

Previously fell back to len(tiers[0]) (e.g. 10 for Webshare) when
PROXY_CONCURRENCY was unset. Default is now MAX_PROXY_CONCURRENCY=200
so single-URL rotating proxies (DC/residential) run at full concurrency
without needing an explicit env var.

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

extract/padelnomics_extract/src/padelnomics_extract/playtomic_availability.py

@@ -52,8 +52,7 @@ MAX_VENUES_PER_RUN = 20_000
 MAX_RETRIES_PER_VENUE = 2
 RECHECK_WINDOW_MINUTES = int(os.environ.get("RECHECK_WINDOW_MINUTES", "30"))
 CIRCUIT_BREAKER_THRESHOLD = int(os.environ.get("CIRCUIT_BREAKER_THRESHOLD") or "10")
-# Override worker count — useful when tier 0 is a single rotating endpoint (DC/residential)
-# that supports many concurrent connections. Defaults to len(tiers[0]) when unset.
+# Worker count: defaults to MAX_PROXY_CONCURRENCY (200). Override via PROXY_CONCURRENCY env var.
 _PROXY_CONCURRENCY = os.environ.get("PROXY_CONCURRENCY", "").strip()
 MAX_PROXY_CONCURRENCY = 200
 
@@ -300,8 +299,7 @@ def extract(
 
     # Set up tiered proxy cycler with circuit breaker
     tiers = load_proxy_tiers()
-    default_workers = len(tiers[0]) if tiers else 1
-    worker_count = min(int(_PROXY_CONCURRENCY), MAX_PROXY_CONCURRENCY) if _PROXY_CONCURRENCY else default_workers
+    worker_count = min(int(_PROXY_CONCURRENCY), MAX_PROXY_CONCURRENCY) if _PROXY_CONCURRENCY else (MAX_PROXY_CONCURRENCY if tiers else 1)
     cycler = make_tiered_cycler(tiers, CIRCUIT_BREAKER_THRESHOLD)
 
     start_min_str = start_min.strftime("%Y-%m-%dT%H:%M:%S")
@@ -491,8 +489,7 @@ def extract_recheck(
 
     # Set up tiered proxy cycler with circuit breaker
     tiers = load_proxy_tiers()
-    default_workers = len(tiers[0]) if tiers else 1
-    worker_count = min(int(_PROXY_CONCURRENCY), MAX_PROXY_CONCURRENCY) if _PROXY_CONCURRENCY else default_workers
+    worker_count = min(int(_PROXY_CONCURRENCY), MAX_PROXY_CONCURRENCY) if _PROXY_CONCURRENCY else (MAX_PROXY_CONCURRENCY if tiers else 1)
     cycler = make_tiered_cycler(tiers, CIRCUIT_BREAKER_THRESHOLD)
 
     if worker_count > 1 and len(venues_to_recheck) > 10: