Add org reusable workflow callers for PRs

Wire this repo to the Sea-Haven-Industries/.github reusable labeler and
dependency-review workflows so PRs get auto-labeled and screened for
high-severity dependency advisories without per-repo config.

.github/workflows/dependency-review.yaml

@@ -0,0 +1,15 @@
+name: dependency-review
+
+# Thin caller that runs the org-wide reusable dependency review
+# (Sea-Haven-Industries/.github :: callable-dependency-review.yaml) on this
+# repo's PRs, failing on high-severity advisories in added dependencies.
+
+on:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    uses: Sea-Haven-Industries/.github/.github/workflows/callable-dependency-review.yaml@main

.github/workflows/labeler.yaml

@@ -0,0 +1,22 @@
+name: labeler
+
+# Thin caller that runs the org-wide reusable PR labeler
+# (Sea-Haven-Industries/.github :: callable-labeler.yaml) on this repo's PRs.
+#
+# Permissions are load-bearing: callers MUST grant all three below. Reusable-
+# workflow permissions can only be downgraded from the caller, so omitting one
+# (e.g. issues:write) either fails to create labels or triggers a silent
+# startup_failure. `pull_request` (NOT pull_request_target) is correct here —
+# the org takes no fork PRs, so the lower-privilege event is sufficient.
+
+on:
+  pull_request:
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+
+jobs:
+  label:
+    uses: Sea-Haven-Industries/.github/.github/workflows/callable-labeler.yaml@main