Added a TG notification on the service startup

Author: miohtama

main.py

@@ -28,6 +28,7 @@
     InterruptHandler,
     check_default_account_balance,
     wait_prysm_ready,
+    telegram,
 )
 
 # Send notification to admins on error
@@ -63,6 +64,16 @@ def main() -> None:
     # wait for interrupt
     interrupt_handler = InterruptHandler()
 
+    # Notify Telegram the oracle is warming up, so that
+    # oracle maintainers know the service has restarted
+    telegram.notify(
+        message=f"Oracle starting with account [{web3_client.eth.defaultAccount}]"
+        f"(https://etherscan.io/address/{web3_client.eth.defaultAccount})",
+        parse_mode="markdown",
+        raise_on_errors=True,
+        disable_web_page_preview=True,
+    )
+
     # wait that node is synced before trying to do anything
     wait_prysm_ready(
         interrupt_handler, BEACON_CHAIN_RPC_ENDPOINT, PROCESS_INTERVAL, logger