fix: improve API key security, add connection banner, and bump to v0.3.0

Former-commit-id: 0c7dc37d83

backend/services/ais_cache.json.REMOVED.git-id

@@ -1 +1 @@
-d26d4853d26982fe4435566ea7c74b154af9be5f
+dc30e31290c6b26fadb8357415bc25e918f10892

backend/services/ais_stream.py

@@ -14,7 +14,7 @@ import os
 logger = logging.getLogger(__name__)
 
 AIS_WS_URL = "wss://stream.aisstream.io/v0/stream"
-API_KEY = os.environ.get("AIS_API_KEY", "75cc39af03c9cc23c90e8a7b3c3bc2b2a507c5fb")
+API_KEY = os.environ.get("AIS_API_KEY", "")
 
 # AIS vessel type code classification
 # See: https://coast.noaa.gov/data/marinecadastre/ais/VesselTypeCodes2018.pdf

backend/services/api_settings.py

@@ -145,12 +145,12 @@ def get_api_keys():
             "has_key": api["env_key"] is not None,
             "env_key": api["env_key"],
             "value_obfuscated": None,
-            "value_plain": None,
+            "is_set": False,
         }
         if api["env_key"]:
             raw = os.environ.get(api["env_key"], "")
             entry["value_obfuscated"] = _obfuscate(raw)
-            entry["value_plain"] = raw  # Sent only when reveal is requested
+            entry["is_set"] = bool(raw)
         result.append(entry)
     return result