refactor(core-api): implement a cache service to DRY the server method logic

[faustbrian]

Proposed changes

While looking into an issue in core-api I noticed that the server method cache could need some cleanup.

Types of changes

• Refactoring (improve a current implementation without adding a new feature or fixing a bug)

Checklist

• I have read the CONTRIBUTING documentation
• Lint and unit tests pass locally with my changes

[codecov-io]

Codecov Report

Merging #1930 into develop will increase coverage by 0.66%.
The diff coverage is 6.49%.

@@             Coverage Diff             @@
##           develop    #1930      +/-   ##
===========================================
+ Coverage    39.83%   40.49%   +0.66%     
===========================================
  Files          327      350      +23     
  Lines         7476     7561      +85     
  Branches      1120     1135      +15     
===========================================
+ Hits          2978     3062      +84     
+ Misses        4485     4484       -1     
- Partials        13       15       +2

Impacted Files	Coverage Δ
...kages/core-api/src/versions/2/shared/controller.ts	0% <ø> (ø)	⬆️
packages/core-api/src/services/transformer.ts	0% <ø> (ø)	⬆️
packages/core-p2p/src/peer.ts	19.1% <ø> (ø)	⬆️
...2p/src/server/versions/internal/handlers/rounds.ts	0% <ø> (ø)	⬆️
packages/core-transaction-pool/src/connection.ts	6.54% <ø> (ø)	⬆️
packages/core-p2p/src/monitor.ts	0% <ø> (ø)	⬆️
packages/core-vote-report/src/handler.ts	100% <ø> (ø)	⬆️
packages/core-api/src/versions/2/votes/methods.ts	0% <0%> (ø)	⬆️
...es/core-api/src/versions/1/transactions/methods.ts	0% <0%> (ø)	⬆️
...es/core-api/src/versions/2/transactions/methods.ts	0% <0%> (ø)	⬆️
... and 37 more

---

Continue to review full report at Codecov.

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov-io]

Codecov Report

Merging #1930 into develop will increase coverage by 0.65%.
The diff coverage is 6.41%.

@@             Coverage Diff             @@
##           develop    #1930      +/-   ##
===========================================
+ Coverage    39.83%   40.49%   +0.65%     
===========================================
  Files          327      350      +23     
  Lines         7476     7562      +86     
  Branches      1120     1108      -12     
===========================================
+ Hits          2978     3062      +84     
  Misses        4485     4485              
- Partials        13       15       +2

Impacted Files	Coverage Δ
...kages/core-api/src/versions/2/shared/controller.ts	0% <ø> (ø)	⬆️
packages/core-api/src/services/transformer.ts	0% <ø> (ø)	⬆️
packages/core-p2p/src/peer.ts	19.1% <ø> (ø)	⬆️
...2p/src/server/versions/internal/handlers/rounds.ts	0% <ø> (ø)	⬆️
packages/core-transaction-pool/src/connection.ts	6.54% <ø> (ø)	⬆️
packages/core-p2p/src/monitor.ts	0% <ø> (ø)	⬆️
packages/core-vote-report/src/handler.ts	100% <ø> (ø)	⬆️
packages/core-api/src/versions/2/votes/methods.ts	0% <0%> (ø)	⬆️
...es/core-api/src/versions/1/transactions/methods.ts	0% <0%> (ø)	⬆️
...es/core-api/src/versions/2/transactions/methods.ts	0% <0%> (ø)	⬆️
... and 37 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update dfa3881...ef0ea1b. Read the comment docs.