fix(mem0-plugin): upgrade REST endpoints to v3, fix dream scheduling docs

- All add_memory REST calls now use /v3/memories/add/ (was /v1/memories/)
- Session start search uses /v3/memories/search/ (was /v2/memories/search/)
- Dream skill: removed reference to nonexistent /schedule skill
  (Claude Code has no native scheduling — recommend external cron instead)

mem0-plugin/scripts/auto_import.py

@@ -101,7 +101,7 @@ def post_memory(api_key: str, content: str, user_id: str, filename: str, project
 
     data = json.dumps(body).encode("utf-8")
     req = urllib.request.Request(
-        f"{API_URL}/v1/memories/",
+        f"{API_URL}/v3/memories/add/",
         data=data,
         headers={
             "Content-Type": "application/json",

mem0-plugin/scripts/capture_compact_summary.py

@@ -115,7 +115,7 @@ def store_summary(api_key: str, summary: str, user_id: str, session_id: str, pro
 
     data = json.dumps(body).encode("utf-8")
     req = urllib.request.Request(
-        f"{API_URL}/v1/memories/",
+        f"{API_URL}/v3/memories/add/",
         data=data,
         headers={
             "Content-Type": "application/json",

mem0-plugin/scripts/import_competing_tools.py

@@ -129,7 +129,7 @@ def post_memory(api_key: str, content: str, user_id: str, project_id: str, branc
     }
     data = json.dumps(body).encode("utf-8")
     req = urllib.request.Request(
-        f"{API_URL}/v1/memories/",
+        f"{API_URL}/v3/memories/add/",
         data=data,
         headers={
             "Content-Type": "application/json",

mem0-plugin/scripts/on_pre_compact.py

@@ -190,7 +190,7 @@ def store_memory(api_key: str, content: str, user_id: str, source: str, session_
 
     data = json.dumps(body).encode("utf-8")
     req = urllib.request.Request(
-        f"{API_URL}/v1/memories/",
+        f"{API_URL}/v3/memories/add/",
         data=data,
         headers={
             "Content-Type": "application/json",