**Root Cause**
Many-to-one relation filters were being exposed under the relation name
(e.g., `company`) instead of the corresponding foreign-key attribute
(e.g., `companyId`).
**Change**
- Detect many-to-one relation metadata and remap those filter keys to
`<fieldName>Id`.
- Removed some unused code unrelated to this fix.
Abdul Rahman
06d8c8c76a