Use the fastapi to improve the GPTCache server

[SimFG]

No description provided.

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: SimFG

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [SimFG]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codecov]

Codecov Report

Merging #405 (c2a5c16) into dev (9265b1a) will decrease coverage by 0.18%.
The diff coverage is 90.35%.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #405      +/-   ##
==========================================
- Coverage   94.26%   94.08%   -0.18%     
==========================================
  Files          84       85       +1     
  Lines        2858     2942      +84     
==========================================
+ Hits         2694     2768      +74     
- Misses        164      174      +10     

Impacted Files	Coverage Δ
gptcache/__init__.py	100.00% <ø> (ø)
gptcache/utils/__init__.py	89.09% <60.00%> (-1.39%)	⬇️
gptcache/report.py	89.65% <87.75%> (-10.35%)	⬇️
gptcache/adapter/openai.py	92.30% <88.00%> (-0.24%)	⬇️
gptcache/adapter/adapter.py	96.73% <100.00%> (+0.18%)	⬆️
gptcache/adapter/api.py	98.46% <100.00%> (+0.02%)	⬆️
gptcache/client.py	100.00% <100.00%> (ø)
gptcache/config.py	100.00% <100.00%> (ø)
gptcache/utils/token.py	100.00% <100.00%> (ø)