feat(ops): use 'reset' quota status for plan-usage reset and invalidate quota cache

When ops staff reset a tenant's current-plan usage, the existing
'refunded' terminal status conflated user-initiated refunds with
ops-driven resets, and tenants still saw the old balance in the top-nav
chip until the quota-summary cache TTL expired.

- Introduce a dedicated 'reset' status for quota_reservations, separate
  from 'refunded'. Both the initial and an incremental migration widen
  the CHECK constraint to allow it; the down migration folds 'reset'
  rows back into 'refunded' before tightening the constraint.
- resetQuotaReservations / resetAIPointReservations now write 'reset'
  without touching refunded_amount, and stop cascading into
  ai_point_usage_logs (carried no audit value for ops resets).
- AdminUserService gains an optional cache dependency and calls
  invalidateQuotaSummaryCache(tenant_id) immediately after a successful
  reset so the tenant's top-nav chip refreshes on the next request
  without waiting on TTL.
- Wire the existing appCache into AdminUserService at boot.
- Drop the now-unused ai_point_usage_logs field from the reset response
  and from the ops-web AdminUsersView type.
- Add a unit test covering the cache-key invalidation contract.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

server/internal/ops/app/admin_user.go

@@ -3,6 +3,7 @@ package app
 import (
 	"context"
 	"errors"
+	"fmt"
 	"net/mail"
 	"regexp"
 	"strings"
@@ -15,6 +16,7 @@ import (
 	"github.com/geo-platform/tenant-api/internal/ops/domain"
 	"github.com/geo-platform/tenant-api/internal/ops/repository"
 	sharedauth "github.com/geo-platform/tenant-api/internal/shared/auth"
+	sharedcache "github.com/geo-platform/tenant-api/internal/shared/cache"
 	"github.com/geo-platform/tenant-api/internal/shared/response"
 )
 
@@ -38,6 +40,7 @@ type AdminUserService struct {
 	users           *repository.AdminUserRepository
 	audits          *AuditService
 	loginGuard      *sharedauth.LoginGuard
+	cache           sharedcache.Cache
 	configMu        sync.RWMutex
 	defaultPlanCode string
 }
@@ -59,6 +62,11 @@ func (s *AdminUserService) WithLoginGuard(g *sharedauth.LoginGuard) *AdminUserSe
 	return s
 }
 
+func (s *AdminUserService) WithCache(c sharedcache.Cache) *AdminUserService {
+	s.cache = c
+	return s
+}
+
 func (s *AdminUserService) UpdateDefaultPlanCode(defaultPlanCode string) {
 	if s == nil {
 		return
@@ -167,7 +175,6 @@ type ResetPlanUsageView struct {
 	ArticleAmount       int64     `json:"article_amount"`
 	AIPointReservations int64     `json:"ai_point_reservations"`
 	AIPointsAmount      int64     `json:"ai_points_amount"`
-	AIPointUsageLogs    int64     `json:"ai_point_usage_logs"`
 	ArticleWindowStart  time.Time `json:"article_window_start"`
 	ArticleWindowEnd    time.Time `json:"article_window_end"`
 	AIPointsWindowStart time.Time `json:"ai_points_window_start"`
@@ -489,12 +496,12 @@ func (s *AdminUserService) ResetCurrentPlanUsage(ctx context.Context, actor *Act
 		ArticleAmount:       reset.ArticleAmount,
 		AIPointReservations: reset.AIPointReservations,
 		AIPointsAmount:      reset.AIPointsAmount,
-		AIPointUsageLogs:    reset.AIPointUsageLogs,
 		ArticleWindowStart:  reset.ArticleWindowStart,
 		ArticleWindowEnd:    reset.ArticleWindowEnd,
 		AIPointsWindowStart: reset.AIPointsWindowStart,
 		AIPointsWindowEnd:   reset.AIPointsWindowEnd,
 	}
+	s.invalidateQuotaSummaryCache(ctx, reset.TenantID)
 
 	if actor != nil {
 		_ = s.audits.Append(ctx, actor.audit(ActionAdminUserResetUsage, "admin_user", id, map[string]any{
@@ -504,7 +511,6 @@ func (s *AdminUserService) ResetCurrentPlanUsage(ctx context.Context, actor *Act
 			"article_amount":         reset.ArticleAmount,
 			"ai_point_reservations":  reset.AIPointReservations,
 			"ai_points_amount":       reset.AIPointsAmount,
-			"ai_point_usage_logs":    reset.AIPointUsageLogs,
 			"article_window_start":   reset.ArticleWindowStart,
 			"article_window_end":     reset.ArticleWindowEnd,
 			"ai_points_window_start": reset.AIPointsWindowStart,
@@ -518,6 +524,13 @@ func (s *AdminUserService) ResetCurrentPlanUsage(ctx context.Context, actor *Act
 	}, nil
 }
 
+func (s *AdminUserService) invalidateQuotaSummaryCache(ctx context.Context, tenantID int64) {
+	if s == nil || s.cache == nil || tenantID <= 0 {
+		return
+	}
+	_ = s.cache.Delete(ctx, fmt.Sprintf("workspace:quota_summary:%d", tenantID))
+}
+
 func (s *AdminUserService) ChangeRole(ctx context.Context, actor *Actor, id int64, role string) (*AdminUserView, error) {
 	normalizedRole := strings.TrimSpace(role)
 	if !isValidTenantRole(normalizedRole) {