added Optimism chain sankey dbt (#388)

models/staging/optimism/fact_optimism_flows.sql

@@ -0,0 +1,38 @@
+{{
+    config(
+        materialized="incremental",
+        snowflake_warehouse="OPTIMISM",
+        unique_key=["chain", "date", "from_category"],
+    )
+}}
+
+WITH category_flows as (
+    SELECT 
+        DATE_TRUNC('day', block_timestamp) as date,
+        from_category,
+        to_category,
+        sum(amount_usd) as amount_usd
+    FROM {{ ref("fact_optimism_labeled_transfers") }}
+    GROUP BY from_category, to_category, date
+), application_flows as (
+    SELECT 
+        DATE_TRUNC('day', block_timestamp) as date,
+        from_category,
+        to_app,
+        max(to_friendly_name) as to_friendly_name,
+        sum(amount_usd) as amount_usd
+    FROM {{ ref("fact_optimism_labeled_transfers") }}
+    GROUP BY from_category, to_app, date
+)
+SELECT
+    'optimism' as chain,
+    cf.date,
+    cf.from_category,
+    cf.to_category,
+    cf.amount_usd as category_amount_usd,
+    af.to_app,
+    af.to_friendly_name,
+    af.amount_usd as application_amount_usd
+FROM category_flows cf
+left JOIN application_flows af
+ON cf.date = af.date AND cf.to_category = af.from_category