Improve port-traffic logs and add manual NE rebind.

Fix unreadable collect-log contrast, surface errors on the Logs button, and let operators re-link a monitor to a chosen inventory NE without wiping samples.

Co-authored-by: Cursor <cursoragent@cursor.com>

netx_api/port_traffic_schemas.py

@@ -51,6 +51,12 @@ class PortTrafficDeviceUpdate(BaseModel):
     vendor: str | None = None
 
 
+class PortTrafficDeviceRebind(BaseModel):
+    """Re-link a monitor device to an explicitly chosen managed/UME NE; keeps samples."""
+
+    ne_id: str = Field(min_length=1, max_length=128)
+
+
 class PortTrafficDeviceOut(BaseModel):
     id: str
     source: str