feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>

migrations/0017_product_feedback.sql

@@ -0,0 +1,24 @@
+-- Buzz product feedback is accepted through a dedicated signed event kind and
+-- sidecarred here instead of entering the ordinary events table. Rows remain
+-- attributable to their source community, while deployment operators may
+-- review the table across communities through internal tooling.
+CREATE TABLE product_feedback (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    community_id UUID NOT NULL REFERENCES communities(id),
+    event_id BYTEA NOT NULL CHECK (length(event_id) = 32),
+    submitter_pubkey BYTEA NOT NULL CHECK (length(submitter_pubkey) = 32),
+    category TEXT CHECK (category IN ('bug', 'praise', 'needs-work')),
+    body TEXT NOT NULL CHECK (length(btrim(body)) > 0),
+    tags JSONB NOT NULL DEFAULT '[]'::jsonb CHECK (jsonb_typeof(tags) = 'array'),
+    event_created_at TIMESTAMPTZ NOT NULL,
+    received_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE (event_id)
+);
+
+CREATE INDEX idx_product_feedback_received
+    ON product_feedback (received_at DESC, id);
+CREATE INDEX idx_product_feedback_community_received
+    ON product_feedback (community_id, received_at DESC, id);
+
+INSERT INTO _operator_global_tables (table_name, reason) VALUES
+    ('product_feedback', 'deployment product inbox; community_id is provenance only');