65 auth implementation

[kislerdm]

What changed

• Auth layer
• Quota usage tracking

Why do we need it

• Access to the core logic using Rest API.
• for v0.0.7, auth of webclient's users

[codecov-commenter]

Codecov Report

Merging #68 (109c07b) into master (a46a504) will decrease coverage by 4.41%. The diff coverage is 73.25%.

@@            Coverage Diff             @@
##           master      #68      +/-   ##
==========================================
- Coverage   90.69%   86.29%   -4.41%     
==========================================
  Files          15       15              
  Lines        1204     1532     +328     
==========================================
+ Hits         1092     1322     +230     
- Misses         90      183      +93     
- Partials       22       27       +5     

Flag	Coverage Δ
cmd-httpserver	∅ <ø> (∅)
pkg-gcpsecretsmanager	77.35% <ø> (ø)
pkg-httpclient	100.00% <ø> (ø)
pkg-openai	90.95% <ø> (ø)
pkg-postgres	86.71% <78.18%> (-7.25%)	:arrow_down:
root	84.65% <69.78%> (-5.43%)	:arrow_down:

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

Impacted Files	Coverage Δ
server/core/httphandler/httphandler.go	70.27% <44.80%> (-20.98%)	:arrow_down:
server/core/diagram/ports.go	93.33% <71.42%> (-6.67%)	:arrow_down:
server/core/pkg/postgres/postgres.go	86.71% <78.18%> (-7.25%)	:arrow_down:
server/core/config/config.go	100.00% <100.00%> (ø)
server/core/diagram/c4container/c4container.go	95.23% <100.00%> (+0.15%)	:arrow_up:
server/core/diagram/input.go	98.40% <100.00%> (+3.52%)	:arrow_up:

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