better logging; run_once check for pull state

app/classes/state/git/PullState.js

@@ -1,6 +1,8 @@
 const AbstractGitState = require('./AbstractGitState')
 
 class PullState extends AbstractGitState {
+    #ran_once = false
+
     static get services() {
         return [...super.services, 'output']
     }
@@ -9,11 +11,12 @@ class PullState extends AbstractGitState {
         if ( !(await this.check()) ) {
             const repo = await this._repo()
             await repo.pull(this._config.target)
+            this.#ran_once = true
         }
     }
 
     async check() {
-        return true // TODO support a better check here
+        return this.#ran_once // TODO support a better check here
     }
 
     async reverse() {