changelog entry + bare-prefix redirect for ingester root_path

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Changelog
 ## [Unreleased]
 
+### Added
+
+- `ingester.api.root_path` (and `haiku-ingester serve --root-path`) serves the control plane under a sub-path for reverse-proxying; forwarded to FastAPI/uvicorn `root_path` and reflected in the dashboard's `<base href>`.
+
 ## [0.56.0] - 2026-06-09
 
 ### Added

docs/ingester.md

@@ -342,6 +342,12 @@ single leading slash with no trailing slash (`ingester`, `/ingester/` and
 before forwarding; for example, with nginx:
 
 ```nginx
+# Redirect the bare prefix to the trailing-slash form so the dashboard's
+# <base href> resolves correctly.
+location = /ingester {
+    return 308 /ingester/;
+}
+
 location /ingester/ {
     rewrite ^/ingester/?(.*)$ /$1 break;
     proxy_pass http://127.0.0.1:8765;