read_seesat_mbox.py and read_seesat_hypermail.py stall on import

[interplanetarychris]

Following unit test updates, both SeeSat archive import scripts appear to be "paused," in a Ctrl-S terminal way, in the process of importing. Ctrl-C in the terminal allows them to continue, but it is unclear what is the underlying cause, or if data loss happens because of the Ctrl-C.

Debugger sessions have yet to refine the location of the problem itself.

From terminal feedback with the -V flag:
https://github.com/consensys-space/trusat-backend/blob/257bf4606147dbd927f3c3b9acf453b475c22656/database_tools/read_seesat_mbox.py#L346

...the script appears to consistently "pause" after the following lines:

Found  67 IOD obs in msg: 2015-03-19 23:23:00+01:00 LB Obs 2015 Mar 19
Found 162 IOD obs in msg: 2018-04-21 10:05:40+02:00 LB Obs 2018 Apr 20-21 night
Found   2 IOD obs in msg: 2019-03-27 22:56:50+01:00 Obs 2019 Mar 27 pm
Found   3 IOD obs in msg: 2019-09-20 07:28:25-04:00 slow moving unid seen on Sept 19

[interplanetarychris]

This is a (bug ?) in the regex new_rde_format_re in iod.py
Moving to a new issue TruSat/trusat-orbit#5 in trusat-orbit