feat: implement PostgresClaimMappingRepository and wire beans

- JdbcTemplate-based CRUD for claim_mapping_rules table
- RbacBeanConfig wires ClaimMappingRepository and ClaimMappingService beans

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

cameleer3-server-app/src/main/java/com/cameleer3/server/app/config/RbacBeanConfig.java

@@ -0,0 +1,27 @@
+package com.cameleer3.server.app.config;
+
+import com.cameleer3.server.app.storage.PostgresClaimMappingRepository;
+import com.cameleer3.server.core.rbac.ClaimMappingRepository;
+import com.cameleer3.server.core.rbac.ClaimMappingService;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+/**
+ * Creates the {@link ClaimMappingRepository} and {@link ClaimMappingService} beans.
+ * <p>
+ * Follows the established pattern: core module plain class, app module bean config.
+ */
+@Configuration
+public class RbacBeanConfig {
+
+    @Bean
+    public ClaimMappingRepository claimMappingRepository(JdbcTemplate jdbcTemplate) {
+        return new PostgresClaimMappingRepository(jdbcTemplate);
+    }
+
+    @Bean
+    public ClaimMappingService claimMappingService() {
+        return new ClaimMappingService();
+    }
+}

cameleer3-server-app/src/main/java/com/cameleer3/server/app/storage/PostgresClaimMappingRepository.java

@@ -0,0 +1,77 @@
+package com.cameleer3.server.app.storage;
+
+import com.cameleer3.server.core.rbac.ClaimMappingRepository;
+import com.cameleer3.server.core.rbac.ClaimMappingRule;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public class PostgresClaimMappingRepository implements ClaimMappingRepository {
+
+    private final JdbcTemplate jdbc;
+
+    public PostgresClaimMappingRepository(JdbcTemplate jdbc) {
+        this.jdbc = jdbc;
+    }
+
+    @Override
+    public List<ClaimMappingRule> findAll() {
+        return jdbc.query("""
+                SELECT id, claim, match_type, match_value, action, target, priority, created_at
+                FROM claim_mapping_rules ORDER BY priority, created_at
+                """, (rs, i) -> new ClaimMappingRule(
+                rs.getObject("id", UUID.class),
+                rs.getString("claim"),
+                rs.getString("match_type"),
+                rs.getString("match_value"),
+                rs.getString("action"),
+                rs.getString("target"),
+                rs.getInt("priority"),
+                rs.getTimestamp("created_at").toInstant()
+        ));
+    }
+
+    @Override
+    public Optional<ClaimMappingRule> findById(UUID id) {
+        var results = jdbc.query("""
+                SELECT id, claim, match_type, match_value, action, target, priority, created_at
+                FROM claim_mapping_rules WHERE id = ?
+                """, (rs, i) -> new ClaimMappingRule(
+                rs.getObject("id", UUID.class),
+                rs.getString("claim"),
+                rs.getString("match_type"),
+                rs.getString("match_value"),
+                rs.getString("action"),
+                rs.getString("target"),
+                rs.getInt("priority"),
+                rs.getTimestamp("created_at").toInstant()
+        ), id);
+        return results.isEmpty() ? Optional.empty() : Optional.of(results.get(0));
+    }
+
+    @Override
+    public UUID create(String claim, String matchType, String matchValue, String action, String target, int priority) {
+        UUID id = UUID.randomUUID();
+        jdbc.update("""
+                INSERT INTO claim_mapping_rules (id, claim, match_type, match_value, action, target, priority)
+                VALUES (?, ?, ?, ?, ?, ?, ?)
+                """, id, claim, matchType, matchValue, action, target, priority);
+        return id;
+    }
+
+    @Override
+    public void update(UUID id, String claim, String matchType, String matchValue, String action, String target, int priority) {
+        jdbc.update("""
+                UPDATE claim_mapping_rules
+                SET claim = ?, match_type = ?, match_value = ?, action = ?, target = ?, priority = ?
+                WHERE id = ?
+                """, claim, matchType, matchValue, action, target, priority, id);
+    }
+
+    @Override
+    public void delete(UUID id) {
+        jdbc.update("DELETE FROM claim_mapping_rules WHERE id = ?", id);
+    }
+}