implemented 0.db as admin database architecture + updated test file

tests/redis_integration_tests.rs

@@ -12,7 +12,15 @@ fn get_redis_connection(port: u16) -> Connection {
         match client.get_connection() {
             Ok(mut conn) => {
                 if redis::cmd("PING").query::<String>(&mut conn).is_ok() {
-                    return conn;
+                    // Acquire ReadWrite permissions on this connection
+                    let sel: RedisResult<String> = redis::cmd("SELECT")
+                        .arg(0)
+                        .arg("KEY")
+                        .arg("test-admin")
+                        .query(&mut conn);
+                    if sel.is_ok() {
+                        return conn;
+                    }
                 }
             }
             Err(e) => {
@@ -78,6 +86,8 @@ fn setup_server() -> (ServerProcessGuard, u16) {
             "--port",
             &port.to_string(),
             "--debug",
+            "--admin-secret",
+            "test-admin",
         ])
         .spawn()
         .expect("Failed to start server process");