953 reduce notification frequency to weekly

[gabrielwol]

What this pull request accomplishes:

• changes two daily "_check" DAGs to weekly.
  • adjust the schedule interval, external task sensors, and the sql params
• removed a non critical check_gaps check for miovision gaps > 4 hours, < 1 day

Issue(s) this solves:

• #953

What, in particular, needs to reviewed:

• My method of linking weekly dag to daily: set task sensor to look 1 week ahead of schedule interval.

What needs to be done by a sysadmin after this PR is merged

• nothing