93427d6dfc
### Summary
Several endpoints related to VAAs and observations returned `null` when no results were found.
This commit changes the behavior to return `[]` instead, which is more ergonomic for users.
Endpoints affected:
- `GET /api/v1/observations/:chain`
- `GET /api/v1/observations/:chain/:emitter`
- `GET /api/v1/observations/:chain/:emitter/:sequence`
- `GET /api/v1/observations/:chain/:emitter/:sequence/:signer/:hash`
- `GET /api/v1/vaas/{chain_id}`
- `GET /api/v1/vaas/{chain_id}/{emitter}`
- `GET /api/v1/vaas/{chain_id}/{emitter}/{seq}`
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|---|---|---|
| .. | ||
| governor | ||
| guardian | ||
| heartbeats | ||
| vaa | ||
| routes.go | ||