feat(api): conditional breaking changes based on app deployments

.changeset/flower-ball-gulp.md

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+---
+'hive': minor
+---
+
+Show affected app deployments for breaking schema changes. When a schema check detects breaking changes, it now shows which active app deployments would be affected, including the specific operations within each deployment that use the affected schema coordinates.

.changeset/jdpj-gvmv-utrp.md

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+---
+'hive': minor
+---
+
+Add `activeAppDeployments` GraphQL query to find app deployments based on usage criteria.
+
+New filter options:
+- `lastUsedBefore`: Find stale deployments that were used but not recently (OR with neverUsedAndCreatedBefore)
+- `neverUsedAndCreatedBefore`: Find old deployments that have never been used (OR with lastUsedBefore)
+- `name`: Filter by app deployment name (case-insensitive partial match, AND with date filters)
+
+Also adds `createdAt` field to the `AppDeployment` type.
+
+See [Finding Stale App Deployments](https://the-guild.dev/graphql/hive/docs/schema-registry/app-deployments#finding-stale-app-deployments) for more details.