feat: fix subscriptions and add bucket notifications

[codecov-commenter]

Codecov Report

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

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

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Additional details and impacted files

```diff @@ 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](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech) | Coverage Δ | | |---|---|---| | [nitric/exception.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL2V4Y2VwdGlvbi5weQ==) | `100.00% <ø> (ø)` | | | [nitric/faas.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL2ZhYXMucHk=) | `79.83% <ø> (-1.19%)` | :arrow_down: | | [nitric/resources/apis.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL3Jlc291cmNlcy9hcGlzLnB5) | `100.00% <ø> (+58.04%)` | :arrow_up: | | [nitric/resources/base.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL3Jlc291cmNlcy9iYXNlLnB5) | `85.10% <ø> (+1.77%)` | :arrow_up: | | [nitric/resources/buckets.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL3Jlc291cmNlcy9idWNrZXRzLnB5) | `80.00% <ø> (-14.29%)` | :arrow_down: | | [nitric/resources/collections.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL3Jlc291cmNlcy9jb2xsZWN0aW9ucy5weQ==) | `93.93% <ø> (ø)` | | | [nitric/resources/queues.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL3Jlc291cmNlcy9xdWV1ZXMucHk=) | `94.11% <ø> (ø)` | | | [nitric/resources/schedules.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL3Jlc291cmNlcy9zY2hlZHVsZXMucHk=) | `96.77% <ø> (+63.44%)` | :arrow_up: | | [nitric/resources/secrets.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL3Jlc291cmNlcy9zZWNyZXRzLnB5) | `94.11% <ø> (ø)` | | | [nitric/resources/topics.py](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#diff-bml0cmljL3Jlc291cmNlcy90b3BpY3MucHk=) | `82.50% <ø> (-4.68%)` | :arrow_down: | | ... and [6 more](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech) | | ... and [9 files with indirect coverage changes](https://app.codecov.io/gh/nitrictech/python-sdk/pull/106/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech)

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