chore: perauset customer project

sql/0013-finance.sql

@@ -0,0 +1,38 @@
+-- ============================================================
+-- Finance records
+-- ============================================================
+
+CREATE TABLE app.finance_record (
+  finance_id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  name TEXT NOT NULL,
+  description TEXT,
+  amount NUMERIC(12,2) NOT NULL,
+  currency TEXT NOT NULL DEFAULT 'EUR',
+  record_type TEXT NOT NULL DEFAULT 'expense', -- expense, income, reimbursement
+  purchased_by_user_id UUID REFERENCES app."user"(user_id),
+  purchased_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  category TEXT NOT NULL DEFAULT 'operations', -- same enum as tasks/inventory
+  created_by_user_id UUID NOT NULL REFERENCES app."user"(user_id),
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX idx_finance_record_category ON app.finance_record(category);
+CREATE INDEX idx_finance_record_purchased_at ON app.finance_record(purchased_at);
+CREATE INDEX idx_finance_record_purchased_by ON app.finance_record(purchased_by_user_id);
+
+-- ============================================================
+-- Finance links (polymorphic — links finance records to any entity)
+-- ============================================================
+
+CREATE TABLE app.finance_link (
+  link_id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  finance_id UUID NOT NULL REFERENCES app.finance_record(finance_id) ON DELETE CASCADE,
+  entity_type TEXT NOT NULL, -- inventory_item, inventory_request, stay, boat_trip, retreat, task, room
+  entity_id UUID NOT NULL,
+  notes TEXT,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX idx_finance_link_finance ON app.finance_link(finance_id);
+CREATE INDEX idx_finance_link_entity ON app.finance_link(entity_type, entity_id);