[CI] Auto-label pooling PRs and issues (#59913)

Signed-off-by: Taneem Ibrahim <taneem.ibrahim@gmail.com>
Co-authored-by: Lucas Wilkinson <LucasWilkinson@users.noreply.github.com>

.github/mergify.yml

@@ -112,6 +112,32 @@ pull_request_rules:
       add:
         - frontend
 
+- name: label-pooling
+  description: Automatically apply pooling label
+  conditions:
+    - -closed
+    - or:
+      - files~=^vllm/entrypoints/pooling/
+      - files~=^vllm/model_executor/layers/pooler/
+      - files=vllm/model_executor/models/transformers/pooling.py
+      - files=vllm/model_executor/models/adapters.py
+      - files=vllm/config/pooler.py
+      - files=vllm/pooling_params.py
+      - files~=^vllm/v1/pool/
+      - files~=^vllm/v1/worker/gpu/pool/
+      - files~=^tests/entrypoints/pooling/
+      - files~=^tests/models/(language|multimodal)/pooling(_mteb_test)?/
+      - files~=^tests/model_executor/layers/test_pooler_.*\.py$
+      - files=tests/test_pooling_params.py
+      - files~=^tests/v1/e2e/general/test_pooling_.*\.py$
+      - files~=^docs/models/pooling_models/
+      - files~=^examples/pooling/
+      - title~=(?i)\bpooling\b
+  actions:
+    label:
+      add:
+        - pooling
+
 - name: label-rust
   description: Automatically apply rust label
   conditions:

.github/workflows/issue_autolabel.yml

@@ -255,6 +255,27 @@ jobs:
               // phrases go in `substrings`: they are specific enough on their
               // own, and a boundary match would miss ordinary variations --
               // "structured outputs", "tool parsers", "prefix caching".
+              pooling: {
+                keywords: [
+                  { term: "pooling",   searchIn: "title" },
+                  { term: "pooler",    searchIn: "title" },
+                  { term: "rerank",    searchIn: "title" },
+                  { term: "reranker",  searchIn: "title" },
+                  { term: "reranking", searchIn: "title" },
+                ],
+                substrings: [
+                  { term: "embedding model",         searchIn: "title" },
+                  { term: "embedding API",           searchIn: "title" },
+                  { term: "embeddings API",          searchIn: "title" },
+                  { term: "sentence embedding",      searchIn: "title" },
+                  { term: "sequence classification", searchIn: "title" },
+                  { term: "token classification",    searchIn: "title" },
+                  { term: "cross-encoder",           searchIn: "title" },
+                  { term: "late interaction",        searchIn: "title" },
+                  { term: "late-interaction",        searchIn: "title" },
+                  { term: "reward model",            searchIn: "title" },
+                ],
+              },
               "speculative-decoding": {
                 keywords: [
                   { term: "eagle",  searchIn: "title" },