Modify FDSN logic to acknowledge multiple channels

There was a hardcoded assumption in get_inventory_from_df that
only one valid value of channel instance should be added to the list
of returned channels from a station.

This is not only false in the case of wildcards (e.g. *F*, *Q*),
it is also false when a channel has been broken into multiple runs.

CAS04 is a good example of this.

See mth5 issue #157, and aurora 277 for more details.

mth5/clients/fdsn.py

@@ -460,8 +460,12 @@ def get_inventory_from_df(self, df, client=None, data=True):
                             channel=ch_row.channel,
                             level="response",
                         )
-                        returned_chan = cha_inv.networks[0].stations[0].channels[0]
-                        returned_sta.channels.append(returned_chan)
+                        # 2023-07-28: Try acknowledge multiple channel runs
+                        # See issue mth5 issue #157 and aurora #277
+                        for returned_chan in cha_inv.networks[0].stations[0].channels:
+                            returned_sta.channels.append(returned_chan)
+                        #returned_chan = cha_inv.networks[0].stations[0].channels[0]
+                        #returned_sta.channels.append(returned_chan)
 
                         # -----------------------------
                         # get data if desired