feat: create data mart of onchain metrics (#928)

* add: dbt model for onchain metrics by project

* refactor: github metrics directory structure

dbt/models/marts/onchain_metrics/onchain_metrics_by_project_arbitrum.sql

@@ -0,0 +1,132 @@
+{# 
+  Arbitrum Onchain Metrics
+  Summary onchain metrics for a project:
+    - num_contracts: The number of contracts in the project
+    - first_txn_date: The date of the first transaction to the project
+    - total_txns: The total number of transactions to the project
+    - total_l2_gas: The total L2 gas used by the project
+    - total_users: The number of unique users interacting with the project    
+    - txns_6_months: The total number of transactions to the project in the last 6 months
+    - l2_gas_6_months: The total L2 gas used by the project in the last 6 months
+    - users_6_months: The number of unique users interacting with the project in the last 6 months
+    - new_users: The number of users interacting with the project for the first time in the last 3 months
+    - active_users: The number of active users interacting with the project in the last 3 months
+    - high_frequency_users: The number of users who have made 1000+ transactions with the project in the last 3 months
+    - more_active_users: The number of users who have made 10-999 transactions with the project in the last 3 months
+    - less_active_users: The number of users who have made 1-9 transactions with the project in the last 3 months
+#}
+
+-- CTE for grabbing the onchain transaction data we care about
+WITH txns AS (
+  SELECT 
+    a.project_id,
+    c.from_source_id AS from_id,
+    DATE(TIMESTAMP_TRUNC(c.time, MONTH)) AS bucket_month,
+    l2_gas,
+    tx_count
+  FROM {{ ref('stg_dune__arbitrum_contract_invocation') }} AS c
+  JOIN {{ ref('stg_ossd__artifacts_by_project') }} AS a ON c.to_source_id = a.artifact_source_id
+),
+
+-- CTEs for calculating all time and 6 month project metrics across all contracts
+metrics_all_time AS (
+  SELECT 
+    project_id,
+    MIN(bucket_month) AS first_txn_date,
+    COUNT (DISTINCT from_id) AS total_users,
+    SUM(l2_gas) AS total_l2_gas,
+    SUM(tx_count) AS total_txns
+  FROM txns
+  GROUP BY project_id
+),
+metrics_6_months AS (
+  SELECT 
+    project_id,
+    COUNT (DISTINCT from_id) AS users_6_months,
+    SUM(l2_gas) AS l2_gas_6_months,
+    SUM(tx_count) AS txns_6_months
+  FROM txns
+  WHERE bucket_month >= DATE_ADD(CURRENT_DATE(), INTERVAL -6 MONTH) 
+  GROUP BY project_id
+),
+
+-- CTE for identifying new users to the project in the last 3 months
+new_users AS (
+  SELECT
+    project_id,
+    SUM(is_new_user) AS new_user_count
+  FROM (
+    SELECT
+      project_id,
+      from_id,
+      CASE WHEN MIN(bucket_month) >= DATE_ADD(CURRENT_DATE(), INTERVAL -3 MONTH) THEN 1 END AS is_new_user
+    FROM txns
+    GROUP BY project_id, from_id
+  )
+  GROUP BY project_id
+),
+
+-- CTEs for segmenting different types of active users based on txn volume
+user_txns_aggregated AS (
+  SELECT
+    project_id,
+    from_id,
+    SUM(tx_count) AS total_tx_count
+  FROM txns
+  WHERE bucket_month >= DATE_ADD(CURRENT_DATE(), INTERVAL -3 MONTH)
+  GROUP BY project_id, from_id
+),
+user_segments AS (
+  SELECT
+    project_id,
+    COUNT(DISTINCT CASE WHEN user_segment = 'HIGH_FREQUENCY_USER' THEN from_id END) AS high_frequency_users,
+    COUNT(DISTINCT CASE WHEN user_segment = 'MORE_ACTIVE_USER' THEN from_id END) AS more_active_users,
+    COUNT(DISTINCT CASE WHEN user_segment = 'LESS_ACTIVE_USER' THEN from_id END) AS less_active_users
+  FROM (
+    SELECT
+      project_id,
+      from_id,
+      CASE 
+        WHEN total_tx_count >= 1000 THEN 'HIGH_FREQUENCY_USER'
+        WHEN total_tx_count >= 10 THEN 'MORE_ACTIVE_USER'
+        ELSE 'LESS_ACTIVE_USER'
+      END AS user_segment
+    FROM user_txns_aggregated
+  )
+  GROUP BY project_id
+),
+
+-- CTE to count the number of contracts deployed by a project
+contracts AS (
+  SELECT
+    project_id,
+    COUNT(artifact_source_id) AS num_contracts
+  FROM {{ ref('stg_ossd__artifacts_by_project') }}
+  GROUP BY project_id
+)
+
+-- Final query to join all the metrics together
+SELECT
+  p.project_id,
+  p.project_name,
+  -- TODO: add deployers owned by project
+  c.num_contracts,
+  ma.first_txn_date,
+  ma.total_txns,
+  ma.total_l2_gas,
+  ma.total_users,
+  m6.txns_6_months,
+  m6.l2_gas_6_months,
+  m6.users_6_months,  
+  nu.new_user_count,
+  (us.high_frequency_users + us.more_active_users + us.less_active_users) AS active_users,
+  us.high_frequency_users,
+  us.more_active_users,
+  us.less_active_users
+
+FROM {{ ref('projects') }} AS p
+JOIN metrics_all_time AS ma ON p.project_id = ma.project_id
+INNER JOIN metrics_6_months AS m6 on p.project_id = m6.project_id
+INNER JOIN new_users AS nu on p.project_id = nu.project_id
+INNER JOIN user_segments AS us on p.project_id = us.project_id
+INNER JOIN contracts AS c on p.project_id = c.project_id