fix: Add env variable to worker timeout configuration.

[tjholm]

Add WORKER_TIMEOUT to allow for the configuration of nitric gateway timeout when waiting for workers to connect.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 49.22%. Comparing base (15c1b16) to head (85ba92c).

❗ Current head 85ba92c differs from pull request most recent head 97546b4

Please upload reports for the commit 97546b4 to get more accurate results.

Files	Patch %	Lines
core/pkg/membrane/membrane.go	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #618      +/-   ##
==========================================
- Coverage   49.24%   49.22%   -0.02%     
==========================================
  Files          23       23              
  Lines        3229     3232       +3     
==========================================
+ Hits         1590     1591       +1     
- Misses       1535     1537       +2     
  Partials      104      104              

Flag	Coverage Δ
aws	43.82% <ø> (+0.07%)	⬆️
azure	53.29% <ø> (ø)
core	77.77% <50.00%> (-1.10%)	⬇️
gcp	47.17% <ø> (ø)

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