feat: add CachedCheckResolver for caching Check subproblems

[jon-whit]

Description

This introduces an implementation of the CheckResolver interface and wires up dispatch delegation in a way that caches Check subproblems between invocation of ResolveCheck calls.

References

Closes #889

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in a PR to openfga.dev -- chore: add check-query-cache as experimental flag
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[jon-whit]

• todo(@jon-whit ) - add tests
• todo(@jon-whit) - wire up the ListObjects server RPC handler to use the CachedCheckResolver as well.
• todo(@jon-whit) - wire up the server flags to configure the Check query cache TTL and Check cache size limit.

[codecov]

Codecov Report

Patch coverage: 85.66% and project coverage change: +0.19% 🎉

Comparison is base (4bc5053) 82.34% compared to head (7df0472) 82.52%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #891      +/-   ##
==========================================
+ Coverage   82.34%   82.52%   +0.19%     
==========================================
  Files          64       66       +2     
  Lines        7760     7969     +209     
==========================================
+ Hits         6389     6576     +187     
- Misses       1069     1088      +19     
- Partials      302      305       +3     

Files Changed	Coverage Δ
internal/graph/mock_check_resolver.go	71.43% <71.43%> (ø)
pkg/server/server.go	76.46% <79.32%> (+0.19%)	⬆️
internal/graph/check.go	91.89% <80.96%> (+0.82%)	⬆️
internal/graph/cached_resolver.go	89.25% <89.25%> (ø)
cmd/run/flags.go	100.00% <100.00%> (ø)
cmd/run/run.go	75.20% <100.00%> (+0.57%)	⬆️
pkg/server/commands/list_objects.go	94.63% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[jon-whit]

LGTM. Left one comment above about adding a test to cached_resolver_test.go for the Close behavior, but not necessarily a blocker.