ci: add missing extension and channel labels to labeler.yml (#81095)

Summary:
- This PR adds `.github/labeler.yml` changed-file rules for 22 bundled plugin directories that currently have no dedicated labeler entry.
- Reproducibility: not applicable. as a CI metadata PR rather than a product bug. The gap is source-verifiable ...  with current-main `.github/labeler.yml`, which shows the added plugin paths exist and are unlabeled today.

Automerge notes:
- No ClawSweeper repair was needed after automerge opt-in.

Validation:
- ClawSweeper review passed for head eef42948d3.
- Required merge gates passed before the squash merge.

Prepared head SHA: eef42948d3
Review: https://github.com/openclaw/openclaw/pull/81095#issuecomment-4432997258

Co-authored-by: clawsweeper <274271284+clawsweeper[bot]@users.noreply.github.com>
Co-authored-by: bing <33149547+bing0901@users.noreply.github.com>

.github/labeler.yml

@@ -454,3 +454,91 @@
   - changed-files:
       - any-glob-to-any-file:
           - "extensions/gradium/**"
+"extensions: amazon-bedrock":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/amazon-bedrock/**"
+"extensions: anthropic-vertex":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/anthropic-vertex/**"
+"extensions: brave":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/brave/**"
+"extensions: chutes":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/chutes/**"
+"extensions: diffs":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/diffs/**"
+"extensions: elevenlabs":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/elevenlabs/**"
+"extensions: firecrawl":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/firecrawl/**"
+"extensions: github-copilot":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/github-copilot/**"
+"extensions: google":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/google/**"
+"extensions: microsoft":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/microsoft/**"
+"extensions: mistral":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/mistral/**"
+"extensions: ollama":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/ollama/**"
+"extensions: opencode":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/opencode/**"
+"extensions: opencode-go":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/opencode-go/**"
+"extensions: openrouter":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/openrouter/**"
+"extensions: openshell":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/openshell/**"
+"extensions: perplexity":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/perplexity/**"
+"extensions: sglang":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/sglang/**"
+"extensions: thread-ownership":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/thread-ownership/**"
+"extensions: vllm":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/vllm/**"
+"extensions: xai":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/xai/**"
+"extensions: zai":
+  - changed-files:
+      - any-glob-to-any-file:
+          - "extensions/zai/**"