feat: add elo tables for house ranking

data_platform/assets/elo/sql/create_comparisons_table.sql

@@ -0,0 +1,11 @@
+create table if not exists {{ schema }}.comparisons (
+    id serial primary key,
+    listing_a_id text not null,
+    listing_b_id text not null,
+    winner_id text not null,
+    elo_a_before double precision not null,
+    elo_b_before double precision not null,
+    elo_a_after double precision not null,
+    elo_b_after double precision not null,
+    created_at timestamptz default now()
+);

data_platform/assets/elo/sql/create_ratings_table.sql

@@ -0,0 +1,9 @@
+create table if not exists {{ schema }}.ratings (
+    global_id text primary key,
+    elo_rating double precision not null default 1500.0,
+    comparison_count integer not null default 0,
+    wins integer not null default 0,
+    losses integer not null default 0,
+    created_at timestamptz default now(),
+    updated_at timestamptz default now()
+);

data_platform/assets/elo/sql/create_schema.sql

@@ -0,0 +1 @@
+create schema if not exists {{ schema }};