feat: loading characters from db at load and runtime

Author: VarKrishin

.env.example

@@ -91,4 +91,10 @@ STARKNET_ADDRESS=
 STARKNET_PRIVATE_KEY=
 STARKNET_RPC_URL=
 
+# runtime management of character agents
+FETCH_FROM_DB=false                         #During startup, fetch the characters from the database
+ENCRYPTION_KEY=                             #mandatory field if FETCH_FROM_DB or AGENT_RUNTIME_MANAGEMENT is true, 
+                                            #used to encrypt the secrets of characters 
+AGENT_RUNTIME_MANAGEMENT=false              #Enable runtime management of character agents
+AGENT_PORT=3001                             #port for the runtime management of character agents if empty default 3001