Merge remote-tracking branch 'origin/master' into native spans

# Conflicts:
#	packages/dd-trace/src/span_processor.js
#	packages/dd-trace/test/span_processor.spec.js

Author: bengl

.agents/skills/apm-integrations/references/new-integration-guide.md

@@ -269,7 +269,7 @@ Add to `.github/workflows/apm-integrations.yml`:
       with:
         version: ${{ matrix.node-version }}
     - uses: ./.github/actions/install
-    - run: yarn test:plugins:ci
+    - run: npm run test:plugins:ci
   strategy:
     matrix:
       node-version: [18, 22]

.github/CODEOWNERS

@@ -353,6 +353,7 @@
 /integration-tests/coverage-fixtures/ @DataDog/lang-platform-js
 /integration-tests/crashtracking/ @DataDog/lang-platform-js
 /integration-tests/helpers/ @DataDog/lang-platform-js
+/integration-tests/import-variants.spec.js @DataDog/lang-platform-js
 /integration-tests/init/ @DataDog/lang-platform-js
 /integration-tests/init.spec.js @DataDog/lang-platform-js
 /integration-tests/memory-leak/ @DataDog/lang-platform-js
@@ -375,6 +376,8 @@
 /packages/dd-trace/src/feature-registry.js @DataDog/lang-platform-js
 /packages/dd-trace/src/js_span_processor.js @DataDog/lang-platform-js
 /packages/dd-trace/src/exporters/common/ @DataDog/lang-platform-js
+/packages/dd-trace/src/exporters/common/client-library-headers.js @DataDog/lang-platform-js @DataDog/feature-flagging-and-experimentation-sdk
+/packages/dd-trace/src/proxy.js @DataDog/lang-platform-js
 /packages/dd-trace/test/agent/ @DataDog/lang-platform-js
 /packages/dd-trace/test/dd-trace.spec.js @DataDog/lang-platform-js
 /packages/dd-trace/test/dogstatsd.spec.js @DataDog/lang-platform-js

.github/actions/instrumentations/test/action.yml

@@ -17,10 +17,10 @@ runs:
     - if: ${{ inputs.node-floor == 'newest-maintenance-lts' }}
       uses: ./.github/actions/node/newest-maintenance-lts
     - uses: ./.github/actions/install
-    - run: yarn test:instrumentations:ci
+    - run: npm run test:instrumentations:ci
       shell: bash
     - uses: ./.github/actions/node/latest
-    - run: yarn test:instrumentations:ci
+    - run: npm run test:instrumentations:ci
       shell: bash
     - uses: ./.github/actions/coverage
       with:

.github/actions/plugins/integration-test-newest-lts/action.yml

@@ -14,7 +14,7 @@ runs:
   steps:
     - uses: ./.github/actions/node/newest-maintenance-lts
     - uses: ./.github/actions/install
-    - run: yarn test:integration:plugins:coverage
+    - run: npm run test:integration:plugins:coverage
       shell: bash
     - uses: ./.github/actions/coverage
       with:

.github/actions/plugins/integration-test/action.yml

@@ -11,10 +11,10 @@ runs:
     - uses: ./.github/actions/testagent/start
     - uses: ./.github/actions/node/oldest-maintenance-lts
     - uses: ./.github/actions/install
-    - run: yarn test:integration:plugins:coverage
+    - run: npm run test:integration:plugins:coverage
       shell: bash
     - uses: ./.github/actions/node/latest
-    - run: yarn test:integration:plugins:coverage
+    - run: npm run test:integration:plugins:coverage
       shell: bash
     - uses: ./.github/actions/coverage
       with:

.github/actions/plugins/test-and-upstream/action.yml

@@ -17,14 +17,14 @@ runs:
     - if: ${{ inputs.node-floor == 'newest-maintenance-lts' }}
       uses: ./.github/actions/node/newest-maintenance-lts
     - uses: ./.github/actions/install
-    - run: yarn test:plugins:ci
+    - run: npm run test:plugins:ci
       shell: bash
-    - run: yarn test:plugins:upstream
+    - run: npm run test:plugins:upstream
       shell: bash
     - uses: ./.github/actions/node/latest
-    - run: yarn test:plugins:ci
+    - run: npm run test:plugins:ci
       shell: bash
-    - run: yarn test:plugins:upstream
+    - run: npm run test:plugins:upstream
       shell: bash
     - uses: ./.github/actions/coverage
       with:

.github/actions/plugins/test/action.yml

@@ -17,10 +17,10 @@ runs:
     - if: ${{ inputs.node-floor == 'newest-maintenance-lts' }}
       uses: ./.github/actions/node/newest-maintenance-lts
     - uses: ./.github/actions/install
-    - run: yarn test:plugins:ci
+    - run: npm run test:plugins:ci
       shell: bash
     - uses: ./.github/actions/node/latest
-    - run: yarn test:plugins:ci
+    - run: npm run test:plugins:ci
       shell: bash
     - uses: ./.github/actions/coverage
       with:

.github/actions/plugins/upstream/action.yml

@@ -17,10 +17,10 @@ runs:
     - if: ${{ inputs.node-floor == 'newest-maintenance-lts' }}
       uses: ./.github/actions/node/newest-maintenance-lts
     - uses: ./.github/actions/install
-    - run: yarn test:plugins:upstream
+    - run: npm run test:plugins:upstream
       shell: bash
     - uses: ./.github/actions/node/latest
-    - run: yarn test:plugins:upstream
+    - run: npm run test:plugins:upstream
       shell: bash
     # `test:plugins:upstream` runs each plugin's upstream test suite (e.g., axios's own tests)
     # against the unit-test harness, which intentionally does not produce NYC coverage for

.github/workflows/aiguard.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: ./.github/actions/node/latest
       - uses: ./.github/actions/install
-      - run: yarn test:aiguard:ci
+      - run: npm run test:aiguard:ci
       - uses: ./.github/actions/coverage
         with:
           flags: aiguard-macos
@@ -39,13 +39,13 @@ jobs:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: ./.github/actions/node/oldest-maintenance-lts
       - uses: ./.github/actions/install
-      - run: yarn test:aiguard:ci
+      - run: npm run test:aiguard:ci
       - uses: ./.github/actions/node/newest-maintenance-lts
-      - run: yarn test:aiguard:ci
+      - run: npm run test:aiguard:ci
       - uses: ./.github/actions/node/active-lts
-      - run: yarn test:aiguard:ci
+      - run: npm run test:aiguard:ci
       - uses: ./.github/actions/node/latest
-      - run: yarn test:aiguard:ci
+      - run: npm run test:aiguard:ci
       - uses: ./.github/actions/coverage
         with:
           flags: aiguard-ubuntu
@@ -65,7 +65,7 @@ jobs:
         with:
           version: 24.14.1 # TODO: remove pin when https://github.com/nodejs/node/issues/62991 is fixed
       - uses: ./.github/actions/install
-      - run: yarn test:aiguard:ci
+      - run: npm run test:aiguard:ci
       - uses: ./.github/actions/node-crash-report
         if: failure()
       - uses: ./.github/actions/coverage
@@ -91,7 +91,7 @@ jobs:
         with:
           version: ${{ matrix.version }}
       - uses: ./.github/actions/install
-      - run: yarn test:integration:aiguard:coverage
+      - run: npm run test:integration:aiguard:coverage
       - uses: ./.github/actions/coverage
         with:
           flags: aiguard-integration-${{ matrix.version }}

.github/workflows/apm-capabilities.yml

@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - uses: ./.github/actions/node/latest
       - uses: ./.github/actions/install
-      - run: yarn test:trace:core:ci
+      - run: npm run test:trace:core:ci
       - uses: ./.github/actions/coverage
         with:
           flags: apm-capabilities-tracing-macos
@@ -52,7 +52,7 @@ jobs:
         with:
           version: ${{ matrix.node-version }}
       - uses: ./.github/actions/install
-      - run: yarn test:trace:core:ci
+      - run: npm run test:trace:core:ci
       - uses: ./.github/actions/coverage
         with:
           flags: apm-capabilities-tracing-ubuntu-${{ matrix.node-version }}
@@ -71,7 +71,7 @@ jobs:
         with:
           version: 24.14.1 # TODO: remove pin when https://github.com/nodejs/node/issues/62991 is fixed
       - uses: ./.github/actions/install
-      - run: yarn test:trace:core:ci
+      - run: npm run test:trace:core:ci
       - uses: ./.github/actions/node-crash-report
         if: failure()
       - uses: ./.github/actions/coverage