[Indexer] Create integration tests

[bitbeckers]

We handle a lot of state changes and utilize (semi) complex queries and SQL functions.

To validate our assumptions of the indexing, parsing, storing and availability of events emitted from EVM chains, we should set up integration tests that follow the following pattern:

• Emit EVM event from the HypercertMinter contract (for example using Anvil)
• Observe, proces and store event
• Check DB state

Pay special attention to token transfers, burns, allow list claims.

[bitbeckers]

Let's first solve #28, #29, #48, #49

[bitbeckers]

Inital integration test created and added to CI stream in #79

[bitbeckers]

WIP. Gradually adding integration tests but we need to have a clean, robust solution for resetting the database between tests. Currently the tests are unstable as they sometime manipulate rows from other test cases

[bitbeckers]

Memory/timing issue with resetting of DB between test. Leaving out of CI for now but focussing on running tests locally to assert functionality