raiseIntent bug fixes

[Roaders]

• getAppIntent does not return root agent instance
• fixed race condition with raising an intent and handling the result

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.58%. Comparing base (d6cf845) to head (d8c336e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #322   +/-   ##
=======================================
  Coverage   91.57%   91.58%           
=======================================
  Files          41       41           
  Lines        5212     5215    +3     
  Branches      911      910    -1     
=======================================
+ Hits         4773     4776    +3     
  Misses        425      425           
  Partials       14       14           

Flag	Coverage Δ
unittests	91.58% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
projects/fdc3-web/src/agent/desktop-agent.ts	93.12% <100.00%> (+0.01%)	⬆️
projects/fdc3-web/src/app-directory/directory.ts	91.81% <100.00%> (+0.01%)	⬆️

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[Copilot]

Pull request overview

Fixes intent resolution edge cases by ensuring the root agent instance is discoverable via directory intent lookups and by preventing a loopback race where an intent listener could miss its first intentEvent.

Changes:

• Populate the root app’s instanceLookup from rootAppDirectoryEntry.interop.intents.listensFor (and refactor duplicate lookup-building logic).
• Defer firing pending awaitIntentListener callbacks to the next macrotask to avoid intentEvent delivery racing ahead of proxy callback registration.
• Bump package versions to 0.12.1, update lockfile, and add changelog entry + targeted tests for both fixes.

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
projects/ui-provider/package.json	Version/peerDependency bump to 0.12.1.
projects/messaging-provider/package.json	Version/peerDependency bump to 0.12.1.
projects/fdc3-web/package.json	Version bump to 0.12.1.
projects/fdc3-web/src/app-directory/directory.ts	Populate root instance intent lookup; refactor lookup population into helper.
projects/fdc3-web/src/app-directory/directory.spec.ts	Adds regression test asserting root instance is returned by getAppIntent.
projects/fdc3-web/src/agent/desktop-agent.ts	Defers intent-listener callback notification via setTimeout(..., 0) to avoid loopback race.
projects/fdc3-web/src/agent/desktop-agent.spec.ts	Adds regression test covering the macrotask deferral behavior.
package-lock.json	Updates workspace package versions and also upgrades several transitive deps.
CHANGELOG.md	Adds 0.12.1 release notes describing both fixes.

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