fix: address final review findings — nerve consume ordering, character init, seeder costs, dead column

- Consume nerve before energy in CrimeService so energy is never lost when nerve is insufficient
- Initialize nerve/max_nerve from config in CharacterController::store (same pattern as energy/health)
- Add nerve_cost to all CrimeSeeder entries proportional to difficulty (1-5 range)
- Remove nerve_regen_at from Character $fillable/$casts/@property — column exists but is not yet wired up

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Services/Game/CrimeService.php

@@ -37,16 +37,16 @@ class CrimeService
             throw new \Exception('Character cannot perform actions right now.');
         }
         
+        // Consume nerve first so energy is never deducted if nerve is insufficient
+        if (!$this->nerveService->consume($character, $crime->nerve_cost)) {
+            throw new \Exception('Not enough nerve to attempt this crime.');
+        }
+
         // Consume energy
         if (!$this->energyService->consume($character, $crime->energy_cost, 'crime')) {
             throw new \Exception('Not enough energy to attempt this crime.');
         }
 
-        // Consume nerve
-        if (!$this->nerveService->consume($character, $crime->nerve_cost)) {
-            throw new \Exception('Not enough nerve to attempt this crime.');
-        }
-
         // Calculate success rate
         $successRate = $crime->calculateSuccessRate($character);
         $isSuccess = random_int(0, 9999) / 10000 <= $successRate;