chore: move the go code into a subfolder

apps/api/cmd/setup/01_sql/projections.sql

@@ -0,0 +1,28 @@
+CREATE TABLE projections.locks (
+    locker_id TEXT,
+    locked_until TIMESTAMPTZ(3),
+    projection_name TEXT,
+    instance_id TEXT NOT NULL,
+
+    PRIMARY KEY (projection_name, instance_id)
+);
+
+CREATE TABLE projections.current_sequences (
+    projection_name TEXT,
+    aggregate_type TEXT,
+    current_sequence BIGINT,
+    instance_id TEXT NOT NULL,
+    timestamp TIMESTAMPTZ,
+
+    PRIMARY KEY (projection_name, aggregate_type, instance_id)
+);
+
+CREATE TABLE projections.failed_events (
+    projection_name TEXT,
+    failed_sequence BIGINT,
+    failure_count SMALLINT,
+    error TEXT,
+    instance_id TEXT NOT NULL,
+
+    PRIMARY KEY (projection_name, failed_sequence, instance_id)
+);