Enable & document Sentry integration

docs/configuration/optional-settings.md

@@ -404,6 +404,39 @@ The file path to the location where [custom scripts](../customization/custom-scr
 
 ---
 
+## SENTRY_DSN
+
+Default: None
+
+Defines a Sentry data source name (DSN) for automated error reporting. `SENTRY_ENABLED` must be True for this parameter to take effect. For example:
+
+```
+SENTRY_DSN = "https://examplePublicKey@o0.ingest.sentry.io/0"
+```
+
+---
+
+## SENTRY_ENABLED
+
+Default: False
+
+Set to True to enable automatic error reporting via [Sentry](https://sentry.io/). Requires `SENTRY_DSN` to be defined.
+
+---
+
+## SENTRY_TAGS
+
+An optional dictionary of tags to apply to Sentry error reports. `SENTRY_ENABLED` must be True for this parameter to take effect. For example:
+
+```
+SENTRY_TAGS = {
+    "custom.foo": "123",
+    "custom.bar": "abc",
+}
+```
+
+---
+
 ## SESSION_COOKIE_NAME
 
 Default: `sessionid`