Add Superset metastore and explore form data caching

Configure DATA_CACHE_CONFIG (1h TTL) and EXPLORE_FORM_DATA_CACHE_CONFIG
(24h TTL) to cache metadata queries in Redis. Dashboard loads trigger
5-20 metadata queries that rarely change but were re-queried every time.

Closes #79

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: szachovy

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Dependabot updates for `github-actions` and `terraform` ecosystems. (#29)
 * CI workflow to build and push service images to GitHub Container Registry on master merge. (#97)
 * Pull-first with local build fallback for container images during deployment. (#97)
+* Superset metastore and explore form data caching via Redis. (#79)
 
 ### Changed
 

services/superset/superset_config.py

@@ -49,3 +49,15 @@ class CeleryConfig:  # pylint: disable=too-few-public-methods
     "CACHE_KEY_PREFIX": "superset_filter_cache",
     "CACHE_REDIS_URL": "redis://redis:6379/0"
 }
+DATA_CACHE_CONFIG = {
+    "CACHE_TYPE": "RedisCache",
+    "CACHE_DEFAULT_TIMEOUT": 3600,
+    "CACHE_KEY_PREFIX": "superset_data_cache",
+    "CACHE_REDIS_URL": "redis://redis:6379/0"
+}
+EXPLORE_FORM_DATA_CACHE_CONFIG = {
+    "CACHE_TYPE": "RedisCache",
+    "CACHE_DEFAULT_TIMEOUT": 86400,
+    "CACHE_KEY_PREFIX": "superset_explore_cache",
+    "CACHE_REDIS_URL": "redis://redis:6379/0"
+}