Add metric for comment labels

tildes/tildes/metrics.py

@@ -15,6 +15,9 @@ from prometheus_client import Counter, Histogram
 _COUNTERS = {
     "votes": Counter("tildes_votes_total", "Votes", labelnames=["target_type"]),
     "comments": Counter("tildes_comments_total", "Comments"),
+    "comment_labels": Counter(
+        "tildes_comment_labels_total", "Comment Labels", labelnames=["label"]
+    ),
     "invite_code_failures": Counter(
         "tildes_invite_code_failures_total", "Invite Code Failures"
     ),

tildes/tildes/models/comment/comment_label.py

@@ -12,6 +12,7 @@ from sqlalchemy.orm import backref, relationship
 from sqlalchemy.sql.expression import text
 
 from tildes.enums import CommentLabelOption
+from tildes.metrics import incr_counter
 from tildes.models import DatabaseModel
 from tildes.models.user import User
 from .comment import Comment
@@ -62,6 +63,8 @@ class CommentLabel(DatabaseModel):
         self.weight = weight
         self.reason = reason
 
+        incr_counter("comment_labels", label=label.name)
+
     @property
     def name(self) -> str:
         """Return the name of the label (to avoid needing to do .label.name)."""