chore: refresh gramsrv public release

deploy/migrations/0031_story_exposures.up.sql

@@ -0,0 +1,19 @@
+CREATE TABLE story_exposures (
+    owner_peer_type TEXT NOT NULL,
+    owner_peer_id BIGINT NOT NULL,
+    story_id INTEGER NOT NULL,
+    viewer_user_id BIGINT NOT NULL,
+    date INTEGER NOT NULL DEFAULT 0,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    CONSTRAINT story_exposures_peer_check CHECK (
+        owner_peer_type IN ('user', 'channel')
+        AND owner_peer_id > 0
+        AND story_id > 0
+        AND viewer_user_id > 0
+    ),
+    PRIMARY KEY (owner_peer_type, owner_peer_id, story_id, viewer_user_id)
+);
+
+CREATE INDEX story_exposures_viewer_idx
+    ON story_exposures (viewer_user_id, owner_peer_type, owner_peer_id, story_id);