[FEATURE] CPU usage improvements

[purplesmoke05]

Is your feature request related to a problem? Please describe.

The amount of CPU resources that indexer batch uses high.
Since the configuration provides the option to start them with a single container,
it is possible to run out of CPU resources up to the limit of the container.
Reducing CPU resource usage is required.

Describe the solution you'd like

• Reduce the number of web3 calls in indexer batch using token cache.
• Not to index informations of tokens of which issuers have been deleted.