create new position views to include isVested in leo in graphql

cmd/graphql.ethereum/schema.graphqls

@@ -522,6 +522,11 @@ type SeawaterPosition {
   """
   upper: Int!
 
+  """
+  True if this position is currently vested in Leo, false otherwise.
+  """
+  isVested: Boolean!
+
   """
   Liquidity available in this specific position.
   """

db/migrations/1725866798-seawater_positions_vested.sql

@@ -0,0 +1,54 @@
+-- migrate:up
+
+-- seawater_positions_vested to determine whether positions are vested 
+-- in Leo by looking at their most recent vest/divest event
+CREATE VIEW seawater_positions_vested AS SELECT DISTINCT ON (position_id)
+    is_vested,
+    position_id,
+    created_by
+FROM (
+    SELECT
+        TRUE AS is_vested,
+        position_id,
+        created_by
+    FROM
+        events_leo_positionvested
+    UNION
+    SELECT
+        FALSE AS is_vested,
+        position_id,
+        created_by
+    FROM
+        events_leo_positiondivested
+    ORDER BY
+        created_by DESC) a;
+
+CREATE VIEW seawater_positions_2 AS
+	SELECT
+		events_seawater_mintPosition.created_by AS created_by,
+		events_seawater_mintPosition.block_hash AS block_hash,
+		events_seawater_mintPosition.transaction_hash AS transaction_hash,
+		events_seawater_mintPosition.block_number AS created_block_number,
+		events_seawater_mintPosition.pos_id AS pos_id,
+		COALESCE(transfers.to_, events_seawater_mintPosition.owner) AS owner,
+		pool,
+		lower,
+		upper,
+        is_vested
+	FROM events_seawater_mintPosition
+	LEFT JOIN events_seawater_transferPosition AS transfers
+		ON transfers.pos_id = events_seawater_mintPosition.pos_id
+    LEFT JOIN seawater_positions_vested AS vested
+        ON vested.position_id = events_seawater_mintPosition.pos_id
+;
+
+CREATE VIEW seawater_active_positions_3 AS
+SELECT
+    seawater_active_positions_2.*,
+    COALESCE(is_vested, FALSE) AS is_vested
+FROM
+    seawater_active_positions_2
+    LEFT JOIN seawater_positions_vested ON seawater_active_positions_2.pos_id = seawater_positions_vested.position_id
+;
+
+-- migrate:down

lib/types/seawater/seawater.go

@@ -29,6 +29,7 @@ type Position struct {
 	Pool            types.Address `json:"pool"`
 	Lower           types.Number  `json:"lower"`
 	Upper           types.Number  `json:"upper"`
+	IsVested        bool          `json:"is_vested"`
 }
 
 // PositionSnapshot taken from snapshot_positions_log_1. Used to service