addition of new dashboard

backend/db/migrations/000021 - agreement-fetch.sql

@@ -0,0 +1,15 @@
+-- Retry bookkeeping for remote agreement-markdown fetches. Kept separate from
+-- agreement_content (which is immutable once inserted) because this state is
+-- mutable: attempts and the next scheduled try are updated on each failure and
+-- the row is deleted once the content is successfully cached.
+CREATE TABLE IF NOT EXISTS public.agreement_fetch (
+    agreement_uuid  UUID PRIMARY KEY,
+    remote_url      TEXT NOT NULL,
+    attempts        INTEGER NOT NULL DEFAULT 0,
+    next_attempt_ts TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    last_error      TEXT,
+    created_ts      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_ts      TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx__public__agreement_fetch__next_attempt_ts ON public.agreement_fetch (next_attempt_ts);