feat: fix subscriptions and add bucket notifications

[HomelessDinosaur]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage: 89.13% and project coverage change: +20.00 🎉

Comparison is base (d6e19d6) 71.91% compared to head (e35bd28) 91.91%.

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Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #106       +/-   ##
============================================
+ Coverage    71.91%   91.91%   +20.00%     
============================================
  Files           32       23        -9     
  Lines         2300     1460      -840     
============================================
- Hits          1654     1342      -312     
+ Misses         646      118      -528     

Impacted Files	Coverage Δ
nitric/exception.py	100.00% <ø> (ø)
nitric/faas.py	79.83% <ø> (-1.19%)	⬇️
nitric/resources/apis.py	100.00% <ø> (+58.04%)	⬆️
nitric/resources/base.py	85.10% <ø> (+1.77%)	⬆️
nitric/resources/buckets.py	80.00% <ø> (-14.29%)	⬇️
nitric/resources/collections.py	93.93% <ø> (ø)
nitric/resources/queues.py	94.11% <ø> (ø)
nitric/resources/schedules.py	96.77% <ø> (+63.44%)	⬆️
nitric/resources/secrets.py	94.11% <ø> (ø)
nitric/resources/topics.py	82.50% <ø> (-4.68%)	⬇️
... and 6 more

... and 9 files with indirect coverage changes

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