Support session UUID prefix queries (#92)

* refs lablup/backend.ai-manager#258
* feat: Show candidate matches for too-many-sessions-matched error
* fix: Apply renaming of the template-based session creation API

Author: achimnol

src/ai/backend/client/cli/pretty.py

@@ -105,10 +105,17 @@ def format_error(exc: Exception):
         yield '{0}: {1} {2}\n'.format(exc.__class__.__name__,
                                       exc.status, exc.reason)
         yield '{0[title]}'.format(exc.data)
-        other_details = exc.data.get('data', None)
-        if other_details:
-            yield '\n\u279c Error details: '
-            yield str(other_details)
+        if exc.data['type'].endswith('/too-many-sessions-matched'):
+            matches = exc.data['data'].get('matches', [])
+            if matches:
+                yield '\nCandidates (up to 10 recent entries):\n'
+            for item in matches:
+                yield '- {0} ({1}, {2})\n'.format(item['id'], item['name'], item['status'])
+        else:
+            other_details = exc.data.get('data', None)
+            if other_details:
+                yield '\n\u279c Error details: '
+                yield str(other_details)
         agent_details = exc.data.get('agent-details', None)
         if agent_details is not None:
             yield '\n\u279c This is an agent-side error. '

src/ai/backend/client/func/session.py

@@ -321,7 +321,7 @@ async def create_from_template(cls, template_id: str, *,
         if cls.session.config.vfolder_mounts:
             mounts.extend(cls.session.config.vfolder_mounts)
         prefix = get_naming(cls.session.api_version, 'path')
-        rqst = Request(cls.session, 'POST', f'/{prefix}/from-template')
+        rqst = Request(cls.session, 'POST', f'/{prefix}/_/create-from-template')
         params = {
             'template_id': template_id,
             'tag': tag,