[eas-cli] Add eas update:embedded:upload command

[gwdp]

Why

EAS Update bundle diffing can't generate patches against the JS bundle embedded in a native build, so the first OTA after install always downloads the full bundle. This command registers the embedded bundle with EAS Update so the diff worker can use it as a patch base.

Ref ENG-21033

How

• New eas update:embedded:upload command with --platform, --bundle, --manifest, --channel, and optional --build-id / --json flags
• Uploads the bundle via presigned URL then registers it via uploadEmbeddedUpdate; two-phase spinner shows progress for each step
• Retries registration on EMBEDDED_UPDATE_ASSET_NOT_AVAILABLE (GCS finalization race) with exponential backoff; other errors bubble up with the server's message (e.g. EMBEDDED_UPDATE_ALREADY_EXISTS for re-uploads)

Test Plan

• yarn jest src/commands/update/embedded/__tests__/upload.test.ts src/graphql/__tests__/client-test.ts — 24 tests pass
• yarn tsc && yarn lint pass
• Ran locally against a real iOS archive:

$ node bin/dev update:embedded:upload \
  --platform ios \
  --bundle ios/CoinFlip.xcarchive/Products/Applications/CoinFlipPreview.app/main.jsbundle \
  --manifest ios/CoinFlip.xcarchive/Products/Applications/CoinFlipPreview.app/EXUpdates.bundle/app.manifest \
  --channel production
✔ Uploaded bundle
✔ Registered ios embedded update (runtimeVersion: 1.0.0, channel: "production")
Embedded update ID: 5f2b4c4b-77a0-45cc-9320-bc8ec2eb36fb

[gwdp]

• [eas-cli] Add eas update:embedded:list command #3722
• [eas-cli] Add eas update:embedded:view command #3721
• [build-tools] Auto-upload embedded bundle after build when opt-in flag is set #3767
• [eas-cli] Add eas update:embedded:upload command #3720 👈 (View in Graphite)
• main

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[linear]

ENG-21033

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.33%. Comparing base (2fc5f20) to head (d400a91).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3720      +/-   ##
==========================================
+ Coverage   57.22%   57.33%   +0.12%     
==========================================
  Files         905      909       +4     
  Lines       39302    39399      +97     
  Branches     8237     8251      +14     
==========================================
+ Hits        22488    22587      +99     
+ Misses      15344    15342       -2     
  Partials     1470     1470              

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[github-actions]

Subscribed to pull request

File Patterns	Mentions
**/*	@douglowder
packages/eas-cli/src/update/**	@wschurman, @quinlanj
packages/eas-cli/src/commands/update/**	@wschurman, @quinlanj

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[github-actions]

✅ Thank you for adding the changelog entry!