feat: Enumerate error codes

[bstasyszyn]

Enumerate the errors and assign error codes. Also, add error code and error component to failure events.

[codecov]

Codecov Report

Attention: 32 lines in your changes are missing coverage. Please review.

Comparison is base (f81471d) 85.32% compared to head (25ec489) 85.27%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1493      +/-   ##
==========================================
- Coverage   85.32%   85.27%   -0.05%     
==========================================
  Files         166      166              
  Lines       10520    10581      +61     
==========================================
+ Hits         8976     9023      +47     
- Misses       1127     1137      +10     
- Partials      417      421       +4     

Files	Coverage Δ
pkg/event/spi/spi.go	100.00% <ø> (ø)
pkg/restapi/resterr/error.go	88.46% <100.00%> (+8.46%)	⬆️
pkg/restapi/v1/issuer/controller.go	86.58% <100.00%> (-0.03%)	⬇️
pkg/restapi/v1/verifier/controller.go	91.51% <100.00%> (+0.01%)	⬆️
...g/service/clientidscheme/clientidscheme_service.go	87.34% <100.00%> (ø)
pkg/service/oidc4ci/claims.go	100.00% <100.00%> (ø)
.../mongodb/oidc4ciclaimdatastore/claim_data_store.go	92.30% <100.00%> (ø)
...storage/mongodb/oidc4cinoncestore/oidc4vc_store.go	100.00% <100.00%> (ø)
...e/mongodb/oidc4cistatestore/oidc4vc_state_store.go	92.45% <100.00%> (ø)
...ge/redis/oidc4ciclaimdatastore/claim_data_store.go	82.14% <100.00%> (ø)
... and 8 more

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