feat(api): add unified v2 gateway and mobile read slice

backend/command-api/sql/v2/002_v2_mobile_support.sql

@@ -0,0 +1,64 @@
+CREATE TABLE IF NOT EXISTS cost_centers (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
+  business_id UUID NOT NULL REFERENCES businesses(id) ON DELETE CASCADE,
+  code TEXT,
+  name TEXT NOT NULL,
+  status TEXT NOT NULL DEFAULT 'ACTIVE'
+    CHECK (status IN ('ACTIVE', 'INACTIVE', 'ARCHIVED')),
+  metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_cost_centers_business_name
+  ON cost_centers (business_id, name);
+
+ALTER TABLE clock_points
+  ADD COLUMN IF NOT EXISTS cost_center_id UUID REFERENCES cost_centers(id) ON DELETE SET NULL;
+
+CREATE TABLE IF NOT EXISTS hub_managers (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
+  hub_id UUID NOT NULL REFERENCES clock_points(id) ON DELETE CASCADE,
+  business_membership_id UUID NOT NULL REFERENCES business_memberships(id) ON DELETE CASCADE,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_hub_managers_hub_membership
+  ON hub_managers (hub_id, business_membership_id);
+
+CREATE TABLE IF NOT EXISTS staff_availability (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
+  staff_id UUID NOT NULL REFERENCES staffs(id) ON DELETE CASCADE,
+  day_of_week SMALLINT NOT NULL CHECK (day_of_week BETWEEN 0 AND 6),
+  availability_status TEXT NOT NULL DEFAULT 'UNAVAILABLE'
+    CHECK (availability_status IN ('AVAILABLE', 'UNAVAILABLE', 'PARTIAL')),
+  time_slots JSONB NOT NULL DEFAULT '[]'::jsonb,
+  metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_staff_availability_staff_day
+  ON staff_availability (staff_id, day_of_week);
+
+CREATE TABLE IF NOT EXISTS staff_benefits (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
+  staff_id UUID NOT NULL REFERENCES staffs(id) ON DELETE CASCADE,
+  benefit_type TEXT NOT NULL,
+  title TEXT NOT NULL,
+  status TEXT NOT NULL DEFAULT 'ACTIVE'
+    CHECK (status IN ('ACTIVE', 'INACTIVE', 'PENDING')),
+  tracked_hours INTEGER NOT NULL DEFAULT 0 CHECK (tracked_hours >= 0),
+  target_hours INTEGER NOT NULL DEFAULT 0 CHECK (target_hours >= 0),
+  metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_staff_benefits_staff_type
+  ON staff_benefits (staff_id, benefit_type);