Add central material calibration support

db/schema.sql

@@ -32,3 +32,17 @@ CREATE TABLE IF NOT EXISTS material_efficiency_snapshots (
 
 CREATE INDEX IF NOT EXISTS material_efficiency_snapshots_machine_time_idx
     ON material_efficiency_snapshots (calculation_id, machine_id, erp_feedback_timestamp);
+
+-- Instantaneous process measurements; no ERP good-area denominator.
+CREATE TABLE IF NOT EXISTS material_application_snapshots (
+    timestamp timestamptz NOT NULL,
+    calculation_id text NOT NULL,
+    machine_id text NOT NULL,
+    production_order text NOT NULL,
+    run_id text NOT NULL,
+    application_g_m2 double precision NOT NULL,
+    PRIMARY KEY (calculation_id, machine_id, production_order, timestamp)
+);
+
+CREATE INDEX IF NOT EXISTS material_application_snapshots_machine_time_idx
+    ON material_application_snapshots (calculation_id, machine_id, timestamp);