[event_v2] indexer logic update to handle migration (#360)

[lightmark]

revert https://github.com/aptos-labs/aptos-indexer-processors/commit/8c41d26171446837edcbf6c7a4084e59fd43f4ba with a fix

[bowenyang007]

Need a better summary and test plan. The summary cannot be "revert of a revert".

[lightmark]

we will not do double emission. refactored.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 42.31884% with 199 lines in your changes missing coverage. Please review.

Project coverage is 49.2%. Comparing base (fbe2cf7) to head (a57e9d3). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...b/postgres/models/token_models/token_activities.rs	0.0%	72 Missing :warning:
...gres/models/token_v2_models/v2_token_activities.rs	32.8%	43 Missing :warning:
.../db/postgres/models/coin_models/coin_activities.rs	0.0%	35 Missing :warning:
...src/db/postgres/models/token_models/token_utils.rs	40.3%	34 Missing :warning:
...set_models/parquet_v2_fungible_asset_activities.rs	0.0%	10 Missing :warning:
...src/db/postgres/models/stake_models/stake_utils.rs	77.7%	2 Missing :warning:
.../postgres/models/token_v2_models/v2_token_utils.rs	88.2%	2 Missing :warning:
...s/parquet_processors/parquet_token_v2_processor.rs	0.0%	1 Missing :warning:

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #388     +/-   ##
=======================================
+ Coverage   48.9%   49.2%   +0.3%     
=======================================
  Files        186     186             
  Lines      24900   25210    +310     
=======================================
+ Hits       12189   12422    +233     
- Misses     12711   12788     +77     

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