Unable to get a team agent to respond to anyone but the creator

**Describe the bug**
Playing with Buzz, lots of potential but not quite there yet. Created an agent with a scope of `Anyone`:

However I'm the only one who can talk to this agent so it defeats the core value proposition of this product:

**Steps to reproduce**
1. Create an agent with 'Anyone' scope
2. Have a team member try to talk to it

**Expected behavior**
It works

**Version and platform**
Find your version at the bottom of the Settings sidebar. Write "unknown" if you can't determine it.
- Buzz version: Version 0.5.10 (0.5.10)
- OS: MacOS Tahoe

**Logs / additional context**
Paste any relevant logs, error messages, or screenshots here.

Start by reproducing the issue with an agent set to Anyone, comparing the creator's behavior with a team member's attempt to talk to it. No files or tests are named, so trace the agent-scope and team-member access flow from that reproduction; done means team members can interact with the agent as expected.

Written by the indexing model from the issue text.