Add container weight tracking for weigh-based concentrate audits

Record the total weight of a jar (product + container) at acquisition so
audits can be done by simply re-weighing the sealed jar. The tare is
derived (containerWeight − productWeight), and the audit flow offers a
"Weigh container" toggle that auto-calculates remaining product from the
scale reading.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/routes/bootstrap.ts

@@ -24,6 +24,7 @@ type InventoryRow = {
   cbd: number;
   total_cannabinoids: number;
   weight: number;
+  container_weight: number | null;
   last_audit_weight: number | null;
   count_original: number;
   count_last_audit: number | null;
@@ -101,6 +102,7 @@ bootstrapRouter.get("/bootstrap", (_req, res) => {
     cbd: i.cbd,
     totalCannabinoids: i.total_cannabinoids,
     weight: i.weight,
+    containerWeight: i.container_weight,
     lastAuditWeight: i.last_audit_weight,
     countOriginal: i.count_original,
     countLastAudit: i.count_last_audit,