900 schema change detection

[Abhishek-N]

PR: #900

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 23.60515% with 178 lines in your changes missing coverage. Please review.

Project coverage is 57.53%. Comparing base (d179ebc) to head (521e395).

Files	Patch %	Lines
...components/Connections/SchemaChangeDetailsForm.tsx	7.14%	138 Missing and 5 partials :warning:
src/components/Connections/Connections.tsx	19.23%	20 Missing and 1 partial :warning:
src/components/Connections/PendingActions.tsx	75.51%	12 Missing :warning:
src/components/DBT/DBTTransformType.tsx	0.00%	1 Missing :warning:
src/components/UI/Menu/Menu.tsx	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #904 +/- ## ========================================== - Coverage 58.97% 57.53% -1.44% ========================================== Files 80 82 +2 Lines 5545 5777 +232 Branches 1315 1360 +45 ========================================== + Hits 3270 3324 +54 - Misses 2158 2330 +172 - Partials 117 123 +6 ```

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[fatchat]

• refresh action works
• pending actions box appears when there are pending actions
• pending actions box not visible when there are no pending actions on page load
• pending actions box does not disappear automatically when schema changes are approved (although does not reappear on page reload)
• changes shows new columns
• changes shows deleted columns
• changes shows tables with changes

[fatchat]

tested on SHRI (production) where the tables have new columns

our UI shows the new columns but it also thinks the tables are new:

[fatchat]

nice, final step is to use a websocket to check for changes, since the request times out if there are several streams