Add an application cache for REST API

[jascks]

Description:

Very preliminary draft to get feedback on general approach to the solution. There is still more implementation and testing to be done.

There are many times that the same request from different sessions all hit our REST server even though cloud CDN is enabled and the responses have proper cache control header set.

There are also periodic high rate of response code 304 from our REST server because some clients will issue a HEAD request with cache id to probe if the cache is still valid. Due to lack of head handler in our js REST module, it ends up to go though the get handler and query data, then expressjs learns the cache is still valid, zeros out the response body and sends a 304 response.

We should add a application layer cache to handle such scenarios so the rest server doesn't unnecessarily go to the database for the data.

Related issue(s):

Fixes #9111

Notes for reviewer:

• Still working out Snyk code security check failure.
• Working on getting performance testing results.
• Determine Redis maxMemory.

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[codecov]

Codecov Report

Attention: Patch coverage is 92.66055% with 8 lines in your changes missing coverage. Please review.

Project coverage is 92.57%. Comparing base (19d22d2) to head (2b65162).
Report is 86 commits behind head on main.

Files with missing lines	Patch %	Lines
hedera-mirror-rest/server.js	88.23%	4 Missing ⚠️
hedera-mirror-rest/cache.js	88.88%	2 Missing ⚠️
hedera-mirror-rest/middleware/metricsHandler.js	0.00%	1 Missing ⚠️
...era-mirror-rest/middleware/responseCacheHandler.js	97.87%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #9173      +/-   ##
============================================
- Coverage     92.57%   92.57%   -0.01%     
  Complexity     7047     7047              
============================================
  Files           915      917       +2     
  Lines         29870    29953      +83     
  Branches       3773     3788      +15     
============================================
+ Hits          27653    27729      +76     
- Misses         1446     1453       +7     
  Partials        771      771              

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud