ASA: Reintroduce caching for tileserver

**As a** User Type/Persona

**I need** Feature/enhancement

**So That** Value, why is this needed, what does the user need to accomplish

**Acceptance Criteria**
- [ ] Given (Context), When (action carried out), Then (expected outcome)
- [ ] Given (Context), When (action carried out), Then (expected outcome)

**Additional Context**
- enter text here
- enter text here

**Definition of Done**
https://github.com/bcgov/wps/wiki/Definition-of-Done

The issue names only the tileserver and provides no files, tests, behavior, or usable acceptance criteria. First locate the tileserver entry point and any historical caching implementation, then clarify the expected cache behavior and define tests that demonstrate the agreed outcome.

Written by the indexing model from the issue text.