[DATA-4] Zipcodes don't work

Zipcodes in the demo ontology are querying the fact table but it should be querying the patient dimension.

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**Imported from Jira**
- **Key:** DATA-4
- **ID:** 10805
- **Type:** Bug
- **Priority:** Minor
- **Status:** To Do
- **Reporter:** Former user
- **Created:** 12/Feb/20 3:07 PM
- **Updated:** 16/Jul/24 8:22 AM
- **Project:** DATA—i2b2 Data
- **Fix versions:** 1.8.2