Track claim fee collections in the Analytics indexer

[PaulRBerg]

At the moment, the Analytics indexers provide data for all fees/revenues as they accrue in the smart contracts.

Claiming the fees is a separate step. For accounting purposes, we need to know when the claims have occurred, how much they were, etc.

See #196.

[PaulRBerg]

Using the CollectFees event.

• https://github.com/sablier-labs/airdrops/blob/main/src/SablierMerkleFactory.sol#L98
• https://github.com/sablier-labs/flow/blob/main/src/abstracts/SablierFlowBase.sol#L221
• https://github.com/sablier-labs/lockup/blob/main/src/abstracts/SablierLockupBase.sol#L335

[PaulRBerg]

In Airdrops v1.3, Lockup v2.0, and Flow v1.1, we can use CollectFees, as explained above.

in Airdrops V2.0, Lockup v3.0, and Flow v2.0, we have to index the Comptroller contract:

• Index Comptroller events #228
• https://github.com/sablier-labs/airdrops/blob/staging/CHANGELOG.md
• https://github.com/sablier-labs/flow/blob/staging/CHANGELOG.md
• https://github.com/sablier-labs/lockup/blob/staging/CHANGELOG.md