feat(ai-proxy): support token usage statistics

[sfwn]

What this PR does / why we need it:

AI-Proxy support token usage statistics.

Which issue(s) this PR fixes:

• Erda Cloud Issue Link

ChangeLog

Language	Changelog
🇺🇸 English	AI-Proxy support token usage statistics
🇨🇳 中文	AI-Proxy 支持 token 用量统计

[codecov]

Codecov Report

❌ Patch coverage is 36.91796% with 569 lines in your changes missing coverage. Please review.
✅ Project coverage is 14.24%. Comparing base (324eb01) to head (1e01cc5).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...ernal/apps/ai-proxy/models/usage/token/dbclient.go	0.00%	132 Missing ⚠️
...common/usage/token_usage/estimators/impl/simple.go	63.15%	70 Missing and 7 partials ⚠️
...common/usage/token_usage/extractors/impl/openai.go	44.35%	64 Missing and 5 partials ⚠️
...ai-proxy/handlers/handler_token_usage/aggregate.go	57.76%	54 Missing and 14 partials ⚠️
...route/filters/request/force-stream-usage/filter.go	0.00%	52 Missing ⚠️
...s/ai-proxy/handlers/handler_token_usage/handler.go	0.00%	36 Missing ⚠️
...pps/ai-proxy/common/usage/token_usage/collector.go	31.91%	32 Missing ⚠️
internal/apps/ai-proxy/models/usage/token/table.go	0.00%	28 Missing ⚠️
...ps/ai-proxy/route/reverse_proxy/response_modify.go	26.31%	22 Missing and 6 partials ⚠️
...ernal/apps/ai-proxy/providers/ai-proxy/provider.go	0.00%	9 Missing ⚠️
... and 8 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6609      +/-   ##
==========================================
+ Coverage   14.18%   14.24%   +0.06%     
==========================================
  Files        3849     3862      +13     
  Lines      385371   386298     +927     
==========================================
+ Hits        54658    55034     +376     
- Misses     325395   325911     +516     
- Partials     5318     5353      +35     

Flag	Coverage Δ
by-github-actions	14.24% <36.91%> (+0.06%)	⬆️

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

Files with missing lines	Coverage Δ
internal/apps/ai-proxy/common/auth/akutil/ak.go	26.66% <100.00%> (+26.66%)	⬆️
...roxy/common/usage/token_usage/proxy_types/types.go	100.00% <100.00%> (ø)
internal/apps/ai-proxy/handlers/errors.go	0.00% <ø> (ø)
internal/apps/ai-proxy/providers/dao/provider.go	0.00% <0.00%> (ø)
internal/pkg/gorilla/mux/provider.go	0.00% <0.00%> (ø)
...oxy/common/usage/token_usage/extractors/factory.go	0.00% <0.00%> (ø)
...ommon/usage/token_usage/extractors/impl/bedrock.go	0.00% <0.00%> (ø)
...oxy/common/usage/token_usage/estimators/factory.go	0.00% <0.00%> (ø)
...ommon/usage/token_usage/extractors/impl/bailian.go	0.00% <0.00%> (ø)
...ternal/apps/ai-proxy/handlers/permission/define.go	0.00% <0.00%> (ø)
... and 11 more

... and 8 files with indirect coverage changes

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