[WDM] Assume Europe/London for update fetching time params.

[neprune]

Relates to https://mysocietysupport.freshdesk.com/a/tickets/7054.

[dracos]

I'm afraid this doesn't do anything, because time_zone is used for parsing with Strptime, not formatting:

$ bin/cron-wrapper perl -MIntegrations::WDM -e'
my $e = Integrations::WDM->new;
print $e->format_datetime( $e->parse_w3c_datetime("2026-06-12T12:00:00Z") );'
2026-06-12 12:00:00

Probably easiest if parse_w3c_datetime is changed to always change the timezone of what it's worked out (which could be a UTC timestamp or a local one already):

    my $dt = $w3c->parse_datetime($dt_string);
    $dt->set_time_zone('Europe/London');

That then gives:

$ bin/cron-wrapper perl -MIntegrations::WDM -e'
my $e = Integrations::WDM->new;
print $e->format_datetime( $e->parse_w3c_datetime("2026-06-12T12:00:00Z") );'
2026-06-12 13:00:00

[neprune]

I'm afraid this doesn't do anything, because time_zone is used for parsing with Strptime, not formatting:

$ bin/cron-wrapper perl -MIntegrations::WDM -e'
my $e = Integrations::WDM->new;
print $e->format_datetime( $e->parse_w3c_datetime("2026-06-12T12:00:00Z") );'
2026-06-12 12:00:00

Probably easiest if parse_w3c_datetime is changed to always change the timezone of what it's worked out (which could be a UTC timestamp or a local one already):

    my $dt = $w3c->parse_datetime($dt_string);
    $dt->set_time_zone('Europe/London');

That then gives:

$ bin/cron-wrapper perl -MIntegrations::WDM -e'
my $e = Integrations::WDM->new;
print $e->format_datetime( $e->parse_w3c_datetime("2026-06-12T12:00:00Z") );'
2026-06-12 13:00:00

Sorry, not my brightest moment. Thanks for laying it out clearly.

I think this change will also affect the timestamps we send out for post_update and raise_defect. Couldn't find any docs on this (WSDL included) but would be odd if these also didn't assume the same timezone so hopefully fine.

[dracos]

Thanks; updated_datetime comes through from FMS with a local timezone (in perllib/Open311.pm) (so +01:00 at the moment), so I assume will be unchanged by setting the timezone to the same thing.