Added GraphQL server

[oxisto]

Adds a GraphQL server and wires it to the CLI. In the future, we will get rid of connect / gRPC.

[codecov]

Codecov Report

Attention: Patch coverage is 63.63636% with 420 lines in your changes missing coverage. Please review.

Project coverage is 60.47%. Comparing base (db257ac) to head (a09bfa2).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
finance/snapshot.go	0.00%	106 Missing ⚠️
graph/schema.resolvers.go	35.62%	98 Missing and 5 partials ⚠️
persistence/accounts.sql.go	53.30%	83 Missing and 16 partials ⚠️
securities/quote/quote.go	66.66%	19 Missing and 8 partials ⚠️
persistence/securities.sql.go	60.52%	11 Missing and 4 partials ⚠️
cli/commands/account.go	85.54%	8 Missing and 4 partials ⚠️
currency/currency.go	83.07%	10 Missing and 1 partial ⚠️
graph/resolver.go	47.05%	6 Missing and 3 partials ⚠️
internal/enum/valueof.go	68.18%	4 Missing and 3 partials ⚠️
cli/commands/securities.go	91.89%	4 Missing and 2 partials ⚠️
... and 10 more

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #534       +/-   ##
===========================================
- Coverage   74.86%   60.47%   -14.39%     
===========================================
  Files          37       35        -2     
  Lines        2144     2014      -130     
===========================================
- Hits         1605     1218      -387     
- Misses        464      714      +250     
- Partials       75       82        +7     

Flag	Coverage Δ
unittests	60.47% <63.63%> (-14.39%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.