Giza integration tests: Distributor node: Cache cleanup flow

Preconditions:

• A running Joystream node
• A running query-node
• A running storage node which accepts channel assets and has sufficient limits set to handle the scenario
• A running distributor node which accepts channel assets and has sufficient limits set to handle the scenario
• Distributor lead is hired

Flow

1. Create 2 channels (either Member or CuratorGroup) with 2 assets each through joystream-cli:
2. Channel 1 assets: A, B
3. Channel 2 assets: C, D
4. Request the channel assets (A-D) from distributor node
5. Remove asset B from channel 1 (through content:removeChannelAssets or content:updateChannel)
6. Unassign distribution bucket from 2nd channel's bag
7. Wait x seconds where x === Distributor node's config.intervals.cacheCleanup (can be exposed via env)
8. Request channel assets from distributor node (A-D)
9. Expect following results:
   • Asset A: 200 OK
   • Asset B: 404 Not Found
   • Asset C: 421 Misdirected request
   • Asset D: 421 Misdirected request

Start by locating the Giza integration tests for the distributor node and the distributor node's config.intervals.cacheCleanup setting; the flow also uses joystream-cli content:removeChannelAssets or content:updateChannel. The test is done when it verifies 200 for A, 404 for removed B, and 421 for C and D after cache cleanup and distribution-bucket removal.