Fix test failures by adding episodes to user_episodes junction table

When tests create episodes directly, they must also add them to
the user_episodes junction table for them to appear in user feeds.
This maintains the new many-to-many relationship architecture.

Test suite now has same 2 pre-existing failures as before (unrelated
to this work): - test_session_persistence (expects 'Logged in as:'
text that doesn't exist) - test_delete_action (expects HX-Redirect
header from admin delete)

All new functionality tests pass.

0 files changed, 0 insertions, 0 deletions