#8547 feat: Future.abort, additional tests and minor fixes (@runspired)
#8539 feat: Rich Documents (@runspired)
#8544 feat: error documents (@runspired)
#8471 feat: cache.peek(<RecordIdentifier>) (@runspired)
#8375 feat: Cache.put (@runspired)
#8456 feat: rename cache.pushData to cache.upsert (@runspired)
#8455 chore: rename Cache.sync to Cache.patch to mirror RFC (@runspired)
#8542 feat: full-relationship definitions when scaffolding with blueprints (@runspired)
#8531 feat: stable document identity (@runspired)
#8518 feat: enable request cache without hydration, better error handling by Fetch Handler (@runspired)
#8501 chore: update imports to support RFC tweaks (@runspired)
#8487 feat: relationship fetching as legacy op (@runspired)
#8484 feat: break saveRecord up into legacy operations (@runspired)
#8472 feat: Store.request (@runspired)
#8473 chore: remove ember-fetch weirdness (@runspired)
#8468 feat: cache.peek and store.request (@runspired)
#8458 feat: Store.cache and Store.createCache (@runspired)
#8454 feat: public API to support cache insert/remove operations (@runspired)
#8358 feat: Store.notifications (@runspired)
#8353 feat: prebuilt v1 addons (@runspired)
#8285 feat: @ember-data/store as v2-lite addon (@runspired)
#8347 feat: don't extend EmberObject/Service for Store (@runspired)
#8342 fix: assign preload data always (@runspired)
#7668 feat: allow .load()ing sync relationships (@machty)

:bug: Bug Fix

#8517 fix: ensure cache-handler works as expected (@runspired)
#8511 updates to lifetimes service and CacheHandler install (@runspired)
#8453 chore: fix ArrayLike.setObjects deprecation message (@runspired)
#8435 fix: de-cycle ember-concurrency access of promise (@runspired)
#8400 fix: deprecated record-array reject use callback (@mrloop)
#8399 fix: deprecated record-array rejectBy use optional value if supplied (@mrloop)
#8436 perf: fix: eliminate SSR/Test memory leak (@runspired)
#8432 fix: ensure classic computed chains support (@runspired)
#8410 fix: add better embroider test and fix embroider compat (@mkszepp)
#8354 fix: improve error/deprecation messaging for inverse fields (@runspired)
#8348 fix: don't use isEqual from @ember/utils for comparing cache values (@runspired)
#8345 fix: give more meaningful error if id matches but is number instead of string (@runspired)
#8344 fix: improve object stringify and verbiage for relationship identifier errors (@runspired)
#8338 fix: json-api-cache should reflect dirty state during save (@runspired)
#8335 fix: <Cache>.changedAttrs should be empty if no local mutations exist (@timmorey)
#8346 fix: Schema.eachTransformedAttribute API should match Model.eachTransformedAttribute (@runspired)
#7900 fix: rollbackAttributes|unloadRecord during hasMany forEach should not error (@runspired)
#8336 fix: dont notify RecordArrayManager if deletion already accounted (@runspired)
#8323 fix: Only remove object(s) from record array if in collection #8318 (@rossketron)
#8341 fix: add meaningful error and proper rejection for id assertion during createRecord commit (@runspired)

:shower: Deprecation Removal

#8423 cleanup: move @ember/string to ember-data peer-dependencies (@runspired)
#8412 cleanup: Switch all uses of @ember/error to native Error (@chriskrycho)

:memo: Documentation

#8548 docs: updates to deprecation guides for remaining 4.x deprecations (@runspired)
#8538 chore: mark legacy docs as legacy (@runspired)
#8537 feat: documentation for Model, the RequestStateService + some docs fixes (@runspired)
#8534 feat: Store and Graph READMEs + Store Overview (@runspired)
#8533 Feat: README files for Debug, Adapter and Serializer (@runspired)
#8526 docs: small cleanups for style (@runspired)
#8505 docs: various documentation cleanup to support new features in 4.12 (@runspired)
#8513 docs: add additional 4.x deprecation guides (@runspired)
#8511 updates to lifetimes service and CacheHandler install (@runspired)
#8500 feat: deprecation guides for most 4.x deprecations (@runspired)
#8467 docs: add module overview for Store (@runspired)
#8461 docs: update READMEs to be more useful (@runspired)
#8440 Correction made to the Model.relatedTypes documentation (@Shubhi-73)

:goal_net: Test

#8529 tests: add tests for meta documents (@runspired)
#8410 fix: add better embroider test and fix embroider compat (@mkszepp)
#8343 test: show #5882 is no longer the case (@runspired)
#8340 test: show that pushing data in can move a record to committed and clean (@runspired)
#8339 test: ensure we do not error if updating the remote state of a locally deleted record (@runspired)

:house: Internal

#8544 feat: error documents (@runspired)
#8540 chore: updated/added some test coverage for RecordArray (@runspired)
#8485 chore: fixup some tests (@runspired)
#8486 chore: reduce PR CI noise (@runspired)
#8479 fix fastboot testing (@runspired)
#8470 chore: nicer CI jobs (@runspired)
#8469 chore: reduce CI workload (@runspired)
#8429 chore: ci speedups (@runspired)
#8476 chore: legacy-handler findRecord support (@runspired)
#8482 chore: begin restricting imports (@runspired)
#8481 chore: bump pnpm, remove @glimmer/env dependency (@runspired)
#8462 chore: port types from #8315 (@runspired)
#8463 chore: cleanup RecordData naming remnants (@runspired)
#8359 chore: rebrand RecordData types to Cache (@runspired)
#8356 feat: @ember-data/json-api/-private/graph => @ember-data/graph (@runspired)
#8357 chore: update package flags (@runspired)
#8355 chore: rename record-data => json-api (@runspired)
#8504 chore: remove canary-features package in favor of type files (@richgt)