big update: added reactions, groups, media share

server/internal/store/migrations/0004_media.sql

@@ -0,0 +1,14 @@
+-- 0004_media.sql
+CREATE TABLE IF NOT EXISTS media (
+    id           BIGSERIAL PRIMARY KEY,
+    uploader_id  BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    filename     TEXT NOT NULL,
+    content_type TEXT NOT NULL,
+    size         BIGINT NOT NULL,
+    storage_key  TEXT NOT NULL UNIQUE,
+    thumb_key    TEXT,
+    created_at   TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+CREATE INDEX IF NOT EXISTS idx_media_uploader ON media(uploader_id);
+
+ALTER TABLE messages ADD COLUMN IF NOT EXISTS media_id BIGINT REFERENCES media(id) ON DELETE SET NULL;