wrap redis client errors to aid debugging

[bobcallaway]

Fixes: #1169

Signed-off-by: Bob Callaway bcallaway@google.com

[codecov-commenter]

Codecov Report

Merging #1176 (9244079) into main (7412e93) will decrease coverage by 22.26%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##             main    #1176       +/-   ##
===========================================
- Coverage   64.23%   41.97%   -22.27%     
===========================================
  Files          82       74        -8     
  Lines        7623     7207      -416     
===========================================
- Hits         4897     3025     -1872     
- Misses       2098     3874     +1776     
+ Partials      628      308      -320     

Flag	Coverage Δ
e2etests	?
unittests	41.97% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/api/index.go	40.35% <0.00%> (-30.83%)	⬇️
pkg/api/metrics.go	0.00% <0.00%> (-100.00%)	⬇️
cmd/rekor-cli/app/useragent.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/api/trillian_client.go	0.00% <0.00%> (-66.31%)	⬇️
pkg/api/api.go	0.00% <0.00%> (-64.29%)	⬇️
pkg/api/entries.go	0.00% <0.00%> (-64.00%)	⬇️
pkg/types/types.go	0.00% <0.00%> (-63.64%)	⬇️
pkg/types/versionmap.go	0.00% <0.00%> (-63.42%)	⬇️
pkg/api/error.go	0.00% <0.00%> (-59.78%)	⬇️
cmd/rekor-cli/app/verify.go	2.47% <0.00%> (-53.72%)	⬇️
... and 46 more

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