refactor(push): simplify internal notification stack

Signed-off-by: Tom Brow <tomb@block.xyz>
Co-authored-by: Codex <noreply@openai.com>
Ai-assisted: true

.github/workflows/ci.yml

@@ -63,7 +63,6 @@ jobs:
               - 'pnpm-lock.yaml'
             mobile:
               - 'mobile/**'
-              - 'crates/buzz-push-gateway/tests/vectors/**'
               - 'scripts/mobile-release.sh'
               - 'scripts/mobile-worktree-overrides.sh'
               - 'scripts/mobile-worktree-clean.sh'
@@ -72,7 +71,6 @@ jobs:
               - 'scripts/test-mobile-release-contract.sh'
               - 'scripts/test-mobile-release-candidate-publisher.sh'
               - 'scripts/test-mobile-worktree-overrides.sh'
-              - 'scripts/test-ios-pbxproj-semantics.py'
               - '.github/workflows/mobile-release-candidate.yml'
               - '.github/workflows/ci.yml'
       - name: Release workflow source contract
@@ -934,9 +932,6 @@ jobs:
         run: swift build -c release --package-path mobile/ios/BuzzPushKit
       - name: Test
         run: swift test --package-path mobile/ios/BuzzPushKit
-      - name: Validate iOS project semantics
-        run: python3 scripts/test-ios-pbxproj-semantics.py
-
   security:
     name: Security
     runs-on: ubuntu-latest