Add last ip override

cloudflare_dyndns.py

@@ -14,7 +14,7 @@ Config (config.ini by default):
     poll_seconds = 3600                  ; optional
 
 Environment overrides (take precedence over config file):
-    CLOUDFLARE_API_TOKEN, CLOUDFLARE_ZONE_ID, IPINFO_URL, POLL_SECONDS, CONFIG_PATH
+    CLOUDFLARE_API_TOKEN, CLOUDFLARE_ZONE_ID, IPINFO_URL, POLL_SECONDS, CONFIG_PATH, LAST_IP_OVERRIDE
 
 Install dependency:
     pip install requests
@@ -52,6 +52,7 @@ def load_config(path: str) -> dict:
         "zone_id": get_opt("cloudflare", "zone_id"),
         "ipinfo_url": get_opt("service", "ipinfo_url"),
         "poll_seconds": None,
+        "last_ip_override": get_opt("service", "last_ip_override"),
     }
 
     poll_raw = get_opt("service", "poll_seconds")
@@ -135,12 +136,15 @@ def main() -> None:
     ipinfo_url = os.getenv("IPINFO_URL") or config.get("ipinfo_url") or IPINFO_DEFAULT
     poll_seconds = os.getenv("POLL_SECONDS")
     poll_seconds = int(poll_seconds) if poll_seconds else config.get("poll_seconds", DEFAULT_POLL_SECONDS)
+    last_ip_override = os.getenv("LAST_IP_OVERRIDE") or config.get("last_ip_override")
 
     session = requests.Session()
-    last_ip: Optional[str] = None
+    last_ip: Optional[str] = last_ip_override
 
     print(f"Starting Cloudflare DDNS watcher (interval={poll_seconds}s)")
     print(f"Using IP endpoint: {ipinfo_url}")
+    if last_ip_override:
+        print(f"Starting with overridden last_ip: {last_ip_override}")
 
     try:
         while True: