-ember-data, model, store
- #8128 fix: backgroundReloads should not affect recordIsLoaded (#8125) (@runspired)
-ember-data
- #8160 port test from #6147 (@runspired)

:rocket: Enhancement

-ember-data, adapter, canary-features, model, record-data, serializer, store, unpublished-adapter-encapsulation-test-app, unpublished-relationship-performance-test-app, unpublished-serializer-encapsulation-test-app
- #8122 v2.1 cache (@runspired)
-ember-data, canary-features, model, private-build-infra, record-data, store, unpublished-adapter-encapsulation-test-app, unpublished-serializer-encapsulation-test-app
- #8114 implement store portion of v2 cache (@runspired)
-ember-data, canary-features, model, record-data, store, unpublished-adapter-encapsulation-test-app, unpublished-serializer-encapsulation-test-app, unpublished-test-infra
- #8129 feat: deprecate v1 cache (@runspired)
-ember-data, adapter, model, private-build-infra, record-data, store, unpublished-relationship-performance-test-app
- #7955 FEAT: Explicit Polymorphic Relationship Support [emberjs/rfcs#793] (@runspired)

:memo: Documentation

-ember-data, adapter, canary-features, model, record-data, serializer, store, unpublished-adapter-encapsulation-test-app, unpublished-relationship-performance-test-app, unpublished-serializer-encapsulation-test-app
- #8122 v2.1 cache (@runspired)
-ember-data, adapter, canary-features, debug, model, private-build-infra, record-data, serializer, store
- #8121 Documentation Upgrades (@runspired)
Other
- #8124 [DOC] typo fix (@jenweber)
-ember-data, canary-features, model, private-build-infra, record-data, store, unpublished-adapter-encapsulation-test-app, unpublished-serializer-encapsulation-test-app
- #8114 implement store portion of v2 cache (@runspired)
#8138 [DOC] typo in identifier initializer documentation (@ciur)

:evergreen_tree: New Deprecation

-ember-data, adapter, model, private-build-infra, serializer, store
- #8093 deprecation: implement helper deprecations (@runspired)
-ember-data, model, private-build-infra
- #8092 deprecation: Model.reopen/reopenClass and eager static fields lookups (@runspired)
-ember-data, adapter, debug, model, private-build-infra, record-data, serializer, store, unpublished-adapter-encapsulation-test-app, unpublished-fastboot-test-app, unpublished-model-encapsulation-test-app, unpublished-serializer-encapsulation-test-app, unpublished-test-infra
- #8084 Love of Mine (@runspired)
-ember-data, adapter, canary-features, model, record-data, serializer, store, unpublished-adapter-encapsulation-test-app, unpublished-relationship-performance-test-app, unpublished-serializer-encapsulation-test-app
- #8122 v2.1 cache (@runspired)
-ember-data, model, private-build-infra, record-data, unpublished-adapter-encapsulation-test-app, unpublished-relationship-performance-test-app, unpublished-serializer-encapsulation-test-app, unpublished-test-infra
- #8115 deprecation: implement strict relationships (@runspired)
-ember-data, canary-features, model, private-build-infra, record-data, store, unpublished-adapter-encapsulation-test-app, unpublished-serializer-encapsulation-test-app
- #8114 implement store portion of v2 cache (@runspired)
-ember-data, canary-features, model, record-data, store, unpublished-adapter-encapsulation-test-app, unpublished-serializer-encapsulation-test-app, unpublished-test-infra
- #8129 feat: deprecate v1 cache (@runspired)
-ember-data, adapter, model, private-build-infra, record-data, store, unpublished-adapter-encapsulation-test-app, unpublished-relationship-performance-test-app, unpublished-serializer-encapsulation-test-app
- #8134 feat: deprecate proxies (implements emberjs/rfcs#846) (@runspired)

:house: Internal

-ember-data
- #7634 [CHORE]: Modernized store-adapter-test (@runnerboy22)
- #7607 test: defined post model individually per test (@runnerboy22)
-ember-data, adapter, debug, model, private-build-infra, record-data, serializer, store, unpublished-adapter-encapsulation-test-app, unpublished-fastboot-test-app, unpublished-model-encapsulation-test-app, unpublished-serializer-encapsulation-test-app, unpublished-test-infra
- #8084 Love of Mine (@runspired)
-ember-data, model, private-build-infra, record-data, store
- #8120 Typescript & encapsulation improvements in advance of cache v2 (@runspired)
-ember-data, model, record-data, store
- #8117 fix: move defaultValue into RecordData to better encapsulate and prevent eager instantiations (@runspired)
-ember-data, model, record-data
- #8130 chore: relationship cleanup (@runspired)
#8151 chore: add release perf check (@runspired)
model, record-data, store
- #8161 chore: restructure graph home (@runspired)

:bug: Bug Fix

-ember-data, adapter, canary-features, debug, model, private-build-infra, record-data, serializer, store
- #8089 fix: unpin yarn for consumers (@runspired)
private-build-infra
- #8108 fix earlier versions of node-14 (@runspired)
model
- #8118 fix: reopen deprecation should properly pass original arguments (@law-rence)
-ember-data, record-data, serializer, store, unpublished-adapter-encapsulation-test-app, unpublished-serializer-encapsulation-test-app
- #8113 fix: account for multi-options-per-identifer possibility (@runspired)
private-build-infra, store
- #8109 fix: add optional polyfill for crypto.randomUUID (@runspired)
-ember-data, model, store
- #8116 Clear subscriptions once unsubscribed, don't unnecessarily churn on subscriptions (@runspired)
-ember-data, model, store
- #8128 fix: backgroundReloads should not affect recordIsLoaded (#8125) (@runspired)
-ember-data, adapter, model, private-build-infra, record-data, store, unpublished-relationship-performance-test-app
- #7955 FEAT: Explicit Polymorphic Relationship Support [emberjs/rfcs#793] (@runspired)
store
- #8159 fix: uuid polyfill logic (@runspired)