fix(05-02): revert credential reference to hardcoded user ID

n8n IF nodes don't support credentials - $credentials syntax only works
in nodes that make external calls. Reverted to direct user ID in the
IF conditions and updated README with simpler configuration instructions.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

n8n-workflow.json

@@ -100,7 +100,7 @@
             {
               "id": "user-auth-condition",
               "leftValue": "={{ $json.message.from.id.toString() }}",
-              "rightValue": "={{ $credentials.telegramAuth.userId }}",
+              "rightValue": "563878771",
               "operator": {
                 "type": "string",
                 "operation": "equals"
@@ -118,13 +118,7 @@
       "position": [
         680,
         200
-      ],
-      "credentials": {
-        "telegramAuth": {
-          "id": "telegram-auth-credential",
-          "name": "Telegram Auth"
-        }
-      }
+      ]
     },
     {
       "parameters": {
@@ -138,7 +132,7 @@
             {
               "id": "callback-auth-condition",
               "leftValue": "={{ $json.callback_query.from.id.toString() }}",
-              "rightValue": "={{ $credentials.telegramAuth.userId }}",
+              "rightValue": "563878771",
               "operator": {
                 "type": "string",
                 "operation": "equals"
@@ -156,13 +150,7 @@
       "position": [
         680,
         500
-      ],
-      "credentials": {
-        "telegramAuth": {
-          "id": "telegram-auth-credential",
-          "name": "Telegram Auth"
-        }
-      }
+      ]
     },
     {
       "parameters": {