fix(hub): resolve netstats import crash-loop

hub/api/main.py imported netstats as a top-level module, but netstats.py
ships inside the api/ package and the service runs uvicorn api.main:app
with WorkingDirectory=/usr/lib/secubox/hub — so the import failed with
ModuleNotFoundError and secubox-hub crash-looped (~9000 restarts on the
live USB image). Use a relative import with a top-level fallback (the
collector adds api/ to sys.path explicitly, so it keeps working).

Bumps secubox-hub 1.5.0 -> 1.5.1.

packages/secubox-hub/api/main.py

@@ -14,7 +14,10 @@ import asyncio
 import os
 import time
 from pathlib import Path
-import netstats  # #758 — shared collector/reader module
+try:
+    from . import netstats          # uvicorn `api.main:app` / aggregator import
+except ImportError:                 # standalone with api/ on sys.path (collector)
+    import netstats  # #758 — shared collector/reader module
 
 app = FastAPI(title="secubox-hub", version="1.7.0", root_path="/api/v1/hub")
 

packages/secubox-hub/debian/changelog

@@ -1,3 +1,15 @@
+secubox-hub (1.5.1-1~bookworm1) bookworm; urgency=medium
+
+  * fix(#758): hub crash-loop — `import netstats` could not resolve.
+    netstats.py ships in the api/ package, but the service runs
+    `uvicorn api.main:app` with WorkingDirectory=/usr/lib/secubox/hub,
+    so the bare top-level import failed with ModuleNotFoundError and the
+    unit restarted ~9000 times. main.py now does `from . import netstats`
+    with a fallback to the top-level import (kept for the collector, which
+    adds api/ to sys.path explicitly). No API change.
+
+ -- Gerald KERMA <devel@cybermind.fr>  Mon, 29 Jun 2026 10:30:00 +0200
+
 secubox-hub (1.5.0-1~bookworm1) bookworm; urgency=medium
 
   * feat(#758): nft-based network-stats collector — root oneshot+timer samples