handle re-orgs for ft and nft metadata

[asimm241]

Description

The PR handles re-orgs for FT and NFT metadata.

closes #639

Type of Change

• New feature
• Bug fix
• API reference/documentation update
• Other

Testing information

Checklist

• Code is commented where needed
• Unit test coverage for new or modified code paths
• npm run test passes
• Changelog is updated
• @zone117x for review

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[codecov]

Codecov Report

Merging #721 (c1212ca) into feat/tokens-metadata (b9b5984) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@                   Coverage Diff                    @@
##           feat/tokens-metadata     #721      +/-   ##
========================================================
+ Coverage                 64.84%   64.90%   +0.06%     
========================================================
  Files                        86       86              
  Lines                      8667     8682      +15     
  Branches                   1333     1339       +6     
========================================================
+ Hits                       5620     5635      +15     
  Misses                     3042     3042              
  Partials                      5        5              

Impacted Files	Coverage Δ
src/datastore/common.ts	78.64% <ø> (ø)
...c/migrations/1621511823100_token-metadata-queue.ts	100.00% <ø> (ø)
src/migrations/1621511823381_nft-metadata.ts	100.00% <ø> (ø)
src/migrations/1621511832113_ft-metadata.ts	100.00% <ø> (ø)
src/tests-tokens/tokens-metadata-tests.ts	0.00% <ø> (ø)
src/api/routes/tokens/tokens.ts	89.18% <100.00%> (-0.56%)	⬇️
src/datastore/postgres-store.ts	84.62% <100.00%> (+0.07%)	⬆️
src/event-stream/tokens-contract-handler.ts	76.00% <100.00%> (+0.74%)	⬆️

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[agraebe]

@zone117x to comment on the new approach for this PR

[zone117x]

This PR should be moved to icebox until we determine the future of this feature (token metadata resolving in the API) -- related to the discussion at #743

If we decide to keep the functionality, this PR needs updated to account for metadata being processed outside of the regular block ingestion code.

[asimm241]

@zone117x what about closing this PR and reopen another one when we finish the discussion at #743, I don't think we will be able to reuse any code from this one. What do you think?

[zone117x]

@asimm241 yep sounds good 👍