feat: add production/enabled flags to environments, drop status enum

Environments now have:
- production (bool): prod vs non-prod resource allocation
- enabled (bool): disabled blocks new deployments

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cameleer3-server-core/src/main/java/com/cameleer3/server/core/runtime/Environment.java

@@ -3,4 +3,11 @@ package com.cameleer3.server.core.runtime;
 import java.time.Instant;
 import java.util.UUID;
 
-public record Environment(UUID id, String slug, String displayName, EnvironmentStatus status, Instant createdAt) {}
+public record Environment(
+        UUID id,
+        String slug,
+        String displayName,
+        boolean production,
+        boolean enabled,
+        Instant createdAt
+) {}

cameleer3-server-core/src/main/java/com/cameleer3/server/core/runtime/EnvironmentRepository.java

@@ -8,8 +8,7 @@ public interface EnvironmentRepository {
     List<Environment> findAll();
     Optional<Environment> findById(UUID id);
     Optional<Environment> findBySlug(String slug);
-    UUID create(String slug, String displayName);
-    void updateDisplayName(UUID id, String displayName);
-    void updateStatus(UUID id, EnvironmentStatus status);
+    UUID create(String slug, String displayName, boolean production);
+    void update(UUID id, String displayName, boolean production, boolean enabled);
     void delete(UUID id);
 }

cameleer3-server-core/src/main/java/com/cameleer3/server/core/runtime/EnvironmentService.java

@@ -20,11 +20,16 @@ public class EnvironmentService {
         return repo.findBySlug(slug).orElseThrow(() -> new IllegalArgumentException("Environment not found: " + slug));
     }
 
-    public UUID create(String slug, String displayName) {
+    public UUID create(String slug, String displayName, boolean production) {
         if (repo.findBySlug(slug).isPresent()) {
             throw new IllegalArgumentException("Environment with slug '" + slug + "' already exists");
         }
-        return repo.create(slug, displayName);
+        return repo.create(slug, displayName, production);
+    }
+
+    public void update(UUID id, String displayName, boolean production, boolean enabled) {
+        getById(id); // verify exists
+        repo.update(id, displayName, production, enabled);
     }
 
     public void delete(UUID id) {

cameleer3-server-core/src/main/java/com/cameleer3/server/core/runtime/EnvironmentStatus.java

@@ -1,3 +0,0 @@
-package com.cameleer3.server.core.runtime;
-
-public enum EnvironmentStatus { ACTIVE, SUSPENDED }