feat(admin): plan statistics + node restart/close-ae actions

Final legacy-admin items:
- identity GET /v1/admin/plan-statistics (active/total users + revenue per plan
  from user_plans); surfaced as a breakdown table in /admin/stats
- NodesTable: wire Restart + Close-AE actions (backend already supported them) via
  new proxy routes; was only drain/release before

Full DivineGateWeb legacy-admin parity achieved.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/identity/FlatRender.IdentitySvc/Application/Services/AdminService.cs

@@ -57,6 +57,23 @@ public class AdminService(IdentityDbContext db)
             pays.Sum(p => p.AmountMinor), payingAllTime, daily);
     }
 
+    // ── Plan statistics ──────────────────────────────────────────────────────
+
+    public async Task<List<PlanStatRow>> GetPlanStatisticsAsync(Guid tenantId)
+    {
+        var now = DateTime.UtcNow;
+        return await db.UserPlans
+            .Where(p => p.TenantId == tenantId)
+            .GroupBy(p => p.PlanName)
+            .Select(g => new PlanStatRow(
+                g.Key,
+                g.Count(),
+                g.Count(x => x.ExpiresAt > now && x.CancelledAt == null),
+                g.Sum(x => x.PriceMinorPaid)))
+            .OrderByDescending(r => r.RevenueMinor)
+            .ToListAsync();
+    }
+
     // ── CRM notes / tags ────────────────────────────────────────────────────
 
     public async Task<UserCrmResponse> GetUserCrmAsync(Guid userId)

services/identity/FlatRender.IdentitySvc/Controllers/AdminController.cs

@@ -22,6 +22,10 @@ public class AdminController(AdminService svc) : ControllerBase
         return Ok(await svc.GetCrmAnalyticsAsync(TenantId, s, e));
     }
 
+    // ── Plan statistics ──────────────────────────────────────────────────────
+    [HttpGet("v1/admin/plan-statistics")]
+    public async Task<IActionResult> PlanStats() => Ok(await svc.GetPlanStatisticsAsync(TenantId));
+
     // ── CRM notes / tags ───────────────────────────────────────────────────────
     [HttpGet("v1/users/{userId:guid}/crm")]
     public async Task<IActionResult> GetCrm(Guid userId) => Ok(await svc.GetUserCrmAsync(userId));

services/identity/FlatRender.IdentitySvc/Models/Admin.cs

@@ -14,6 +14,10 @@ public record CrmAnalyticsResponse(
     List<CrmDailyPoint> Daily
 );
 
+// ── Plan statistics breakdown ────────────────────────────────────────────────
+
+public record PlanStatRow(string PlanName, int Total, int Active, long RevenueMinor);
+
 // ── CRM notes / tags per customer ────────────────────────────────────────────
 
 public record UserCrmResponse(string[] Tags, string? Note, string Status);