dummy data fails to import

on a fresh install and attempting to bring up with docker (no changes to any files:

```
oncall-web-1 | DB successfully loaded /home/oncall/db/schema.v0.sql
oncall-web-1 | Importing /home/oncall/db/dummy_data.sql...
oncall-web-1 | mysql: [Warning] Using a password on the command line interface can be insecure.
oncall-web-1 | ERROR 1136 (21S01) at line 16: Column count doesn't match value count at row 1
oncall-web-1 | Ran into problems during DB bootstrap. oncall will likely not function correctly. mysql exit code: 1 for /home/oncall/db/dummy_data.sql
oncall-web-1 | Wrote /home/oncall/db_initialized so we don't bootstrap db again
```

Start with db/dummy_data.sql at line 16 and compare its INSERT values with the table definitions in db/schema.v0.sql. Reproduce the fresh-install Docker bootstrap and verify that dummy_data.sql imports without MySQL error 1136 and the database initialization completes successfully.

Written by the indexing model from the issue text.