refactor(db): replace sqlc with handwritten pgx repos

- Finish Paddle-to-Stripe billing migration; drop paddle/stripe libs
- Renumber migrations; add 00012 memberships+manage_token,
  00013 location_type_capacity
- Add tests: admin, auth, bookings customer service
- Remove graphify-out artifacts and stale env files

Authored By: TDvorak <[email protected]>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/backend/internal/db/locations.go

@@ -1,13 +1,15 @@
 package db
 
 import (
-"context"
-"time"
+	"context"
+	"time"
 )
 
+const locationColumns = "id, tenant_id, name, type, capacity, timezone, created_at"
+
 func (r *PGRepository) ListLocationsByTenant(ctx context.Context, tenantID string) ([]LocationRecord, error) {
 	rows, err := r.pool.Query(ctx, `
-		SELECT id, tenant_id, name, timezone, created_at
+		SELECT `+locationColumns+`
 		FROM locations
 		WHERE tenant_id = $1
 		ORDER BY name
@@ -20,7 +22,7 @@ func (r *PGRepository) ListLocationsByTenant(ctx context.Context, tenantID strin
 	var records []LocationRecord
 	for rows.Next() {
 		var rec LocationRecord
-		if err := rows.Scan(&rec.ID, &rec.TenantID, &rec.Name, &rec.Timezone, &rec.CreatedAt); err != nil {
+		if err := rows.Scan(&rec.ID, &rec.TenantID, &rec.Name, &rec.Type, &rec.Capacity, &rec.Timezone, &rec.CreatedAt); err != nil {
 			return nil, err
 		}
 		records = append(records, rec)
@@ -31,20 +33,20 @@ func (r *PGRepository) ListLocationsByTenant(ctx context.Context, tenantID strin
 func (r *PGRepository) GetLocationByID(ctx context.Context, locationID string) (LocationRecord, error) {
 	var rec LocationRecord
 	err := r.pool.QueryRow(ctx, `
-		SELECT id, tenant_id, name, timezone, created_at
+		SELECT `+locationColumns+`
 		FROM locations
 		WHERE id = $1
-	`, locationID).Scan(&rec.ID, &rec.TenantID, &rec.Name, &rec.Timezone, &rec.CreatedAt)
+	`, locationID).Scan(&rec.ID, &rec.TenantID, &rec.Name, &rec.Type, &rec.Capacity, &rec.Timezone, &rec.CreatedAt)
 	return rec, err
 }
 
 func (r *PGRepository) CreateLocation(ctx context.Context, params CreateLocationParams) (LocationRecord, error) {
 	var rec LocationRecord
 	err := r.pool.QueryRow(ctx, `
-		INSERT INTO locations (tenant_id, name, timezone)
-		VALUES ($1, $2, $3)
-		RETURNING id, tenant_id, name, timezone, created_at
-	`, params.TenantID, params.Name, params.Timezone).Scan(&rec.ID, &rec.TenantID, &rec.Name, &rec.Timezone, &rec.CreatedAt)
+		INSERT INTO locations (tenant_id, name, type, capacity, timezone)
+		VALUES ($1, $2, $3, $4, $5)
+		RETURNING `+locationColumns+`
+	`, params.TenantID, params.Name, params.Type, params.Capacity, params.Timezone).Scan(&rec.ID, &rec.TenantID, &rec.Name, &rec.Type, &rec.Capacity, &rec.Timezone, &rec.CreatedAt)
 	return rec, err
 }
 
@@ -53,11 +55,13 @@ func (r *PGRepository) UpdateLocation(ctx context.Context, locationID string, pa
 	err := r.pool.QueryRow(ctx, `
 		UPDATE locations
 		SET name = COALESCE($2, name),
-		    timezone = COALESCE($3, timezone),
+		    type = COALESCE($3, type),
+		    capacity = COALESCE($4, capacity),
+		    timezone = COALESCE($5, timezone),
 		    updated_at = now()
 		WHERE id = $1
-		RETURNING id, tenant_id, name, timezone, created_at
-	`, locationID, params.Name, params.Timezone).Scan(&rec.ID, &rec.TenantID, &rec.Name, &rec.Timezone, &rec.CreatedAt)
+		RETURNING `+locationColumns+`
+	`, locationID, params.Name, params.Type, params.Capacity, params.Timezone).Scan(&rec.ID, &rec.TenantID, &rec.Name, &rec.Type, &rec.Capacity, &rec.Timezone, &rec.CreatedAt)
 	return rec, err
 }
 
@@ -120,7 +124,7 @@ func (r *PGRepository) DeleteBlockedDay(ctx context.Context, blockedDayID string
 
 func (r *PGRepository) ListWorkingHoursByTenant(ctx context.Context, tenantID string) ([]WorkingHoursRecord, error) {
 	rows, err := r.pool.Query(ctx, `
-		SELECT tenant_id, staff_id, day_of_week, starts_local, ends_local
+		SELECT tenant_id, staff_id, day_of_week, starts_local::text, ends_local::text
 		FROM availability_rules
 		WHERE tenant_id = $1 AND staff_id IS NULL
 		ORDER BY day_of_week
@@ -142,11 +146,30 @@ func (r *PGRepository) ListWorkingHoursByTenant(ctx context.Context, tenantID st
 }
 
 func (r *PGRepository) UpdateWorkingHours(ctx context.Context, tenantID string, dayOfWeek int, params UpdateWorkingHoursParams) error {
-	_, err := r.pool.Exec(ctx, `
-		UPDATE availability_rules
-		SET starts_local = COALESCE($3, starts_local),
-		    ends_local = COALESCE($4, ends_local)
+	if params.IsOpen != nil && !*params.IsOpen {
+		_, err := r.pool.Exec(ctx, `
+			DELETE FROM availability_rules
+			WHERE tenant_id = $1 AND day_of_week = $2 AND staff_id IS NULL
+		`, tenantID, dayOfWeek)
+		return err
+	}
+
+	if params.StartsLocal == nil || params.EndsLocal == nil {
+		return nil
+	}
+
+	// availability_rules has no unique constraint on (tenant, day): replace the
+	// tenant-level row so repeated updates stay idempotent.
+	if _, err := r.pool.Exec(ctx, `
+		DELETE FROM availability_rules
 		WHERE tenant_id = $1 AND day_of_week = $2 AND staff_id IS NULL
-	`, tenantID, dayOfWeek, params.StartsLocal, params.EndsLocal)
+	`, tenantID, dayOfWeek); err != nil {
+		return err
+	}
+
+	_, err := r.pool.Exec(ctx, `
+		INSERT INTO availability_rules (id, tenant_id, staff_id, day_of_week, starts_local, ends_local)
+		VALUES (gen_random_uuid(), $1, NULL, $2, $3::time, $4::time)
+	`, tenantID, dayOfWeek, *params.StartsLocal, *params.EndsLocal)
 	return err
 }