Database/schema routing for static/guest embedding

**Is your feature request related to a problem? Please describe.**
Creating this issue to track the request that some users have about having database routing but with static embeds

**Describe the solution you'd like**
Send the db route we should follow on the signed jwt on static embeddings

**Describe alternatives you've considered**
None

**How important is this feature to you?**
Requested by some users

**Additional context**
NA

The issue does not identify files, tests, or entry points. Start by tracing static embedding authentication and signed JWT handling, then locate database-routing logic and determine how the requested route should be represented and consumed. Done means static or guest embeds follow the database route carried in the signed JWT, with coverage for the supported embedding flow.

Written by the indexing model from the issue text.