adding client notes

docs/android-questionnaire-api.md

@@ -309,6 +309,7 @@ Success:
     "clients": [
       {
         "clientCode": "CLIENT-001",
+        "note": "Call back next week",
         "completedQuestionnaires": [
           {
             "questionnaireID": "questionnaire_1_demographic_information",
@@ -319,6 +320,7 @@ Success:
       },
       {
         "clientCode": "CLIENT-002",
+        "note": "",
         "completedQuestionnaires": []
       }
     ]
@@ -330,6 +332,7 @@ Fields:
 
 - `clients`: array of client objects assigned to the coach, ordered alphabetically by `clientCode`.
 - `clients[].clientCode`: the client's code string.
+- `clients[].note`: counselor follow-up note for this client (max 200 characters; empty string when none).
 - `clients[].completedQuestionnaires`: array of questionnaires already completed by this client. Empty array if none.
 - `clients[].completedQuestionnaires[].questionnaireID`: the questionnaire ID, matching the IDs from the questionnaire list endpoint.
 - `clients[].completedQuestionnaires[].sumPoints`: total points from the last upload for this questionnaire.
@@ -444,6 +447,24 @@ Allowed roles: `admin`, `supervisor`, `coach`.
 
 The authenticated user must be authorized for the submitted `clientCode`. A coach can upload for their own clients. A supervisor can upload for clients of their coaches. An admin can upload for any client.
 
+### Set client note
+
+Encrypted body action (coach only):
+
+```json
+{
+  "action": "setClientNote",
+  "clientCode": "CLIENT-001",
+  "note": "Call back next week"
+}
+```
+
+- `note` is optional; omit or send `""` to clear. Max **200** characters after sanitization (same free-text rules as interview answers).
+- Response `data` is an encrypted envelope containing `{ "clientCode", "note" }`.
+- Notes are stored in `client_followup_note` (shared with the web Insights follow-up list).
+
+### Submit questionnaire answers
+
 Request:
 
 ```json