[graphman] Add support for moving subgraphs between databases

[SpontaneousOverthrow]

Type: Feature

It will be great if graphman can move subgraphs between databases.
For example i have some synced subgraphs on one indexer and i want to move them to another indexer.

Currently i can dump schema for subgraph and add update subgraph_deployment, subgraph_manifest, subgraph_error and dynamic_ethereum_contract_data_source. But this is a bit tricky.

[azf20]

Thanks @SpontaneousOverthrow - have you tried using sharding (vs. separate databases)! @lutter this is an interesting idea.

[SpontaneousOverthrow]

@azf20 sorry for late response. currently i am testing sharding, seems it works nice but i need more tests.

It will be great if graphman can create sort of sql dump file which can be restore in new\existing database.

[fordN]

Supported now! Though it's still a bit involved to administrate.