feat: add durable matchmaking metadata schema

server/migrations/0001_initial.sql

@@ -19,6 +19,15 @@ CREATE TABLE sessions (
     created_at TIMESTAMPTZ NOT NULL DEFAULT now()
 );
 
+CREATE TABLE idempotency_keys (
+    scope TEXT NOT NULL,
+    idempotency_key TEXT NOT NULL CHECK (char_length(idempotency_key) BETWEEN 16 AND 128),
+    payload_digest BYTEA NOT NULL,
+    result JSONB NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    PRIMARY KEY (scope, idempotency_key)
+);
+
 CREATE TABLE queue_tickets (
     ticket_id TEXT PRIMARY KEY,
     player_id TEXT NOT NULL REFERENCES identities(player_id),
@@ -95,6 +104,25 @@ CREATE TABLE ratings (
     updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
 );
 
+CREATE TABLE seasons (
+    season_id TEXT PRIMARY KEY,
+    playlist TEXT NOT NULL CHECK (playlist = 'ranked'),
+    starts_at TIMESTAMPTZ NOT NULL,
+    ends_at TIMESTAMPTZ NOT NULL CHECK (ends_at > starts_at),
+    rolled_over_at TIMESTAMPTZ
+);
+
+CREATE TABLE penalties (
+    penalty_id TEXT PRIMARY KEY,
+    player_id TEXT NOT NULL REFERENCES identities(player_id),
+    match_id TEXT REFERENCES matches(match_id),
+    playlist TEXT NOT NULL CHECK (playlist IN ('casual', 'ranked')),
+    kind TEXT NOT NULL,
+    starts_at TIMESTAMPTZ NOT NULL,
+    ends_at TIMESTAMPTZ NOT NULL CHECK (ends_at > starts_at),
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
 CREATE TABLE result_receipts (
     result_id TEXT PRIMARY KEY,
     match_id TEXT NOT NULL UNIQUE REFERENCES matches(match_id),