fix: 修复 OpenAPI 方法名大小写解析问题，添加建表 SQL

backend-single/create_api_tables.sql

@@ -0,0 +1,34 @@
+CREATE TABLE IF NOT EXISTS emotion_museum.api_endpoint (
+    id              VARCHAR(64) PRIMARY KEY,
+    path            VARCHAR(500) NOT NULL,
+    method          VARCHAR(10) NOT NULL,
+    operation_id    VARCHAR(200),
+    summary         VARCHAR(500),
+    description     TEXT,
+    tags            VARCHAR(500),
+    deprecated      TINYINT(1) DEFAULT 0,
+    request_schema  JSON,
+    response_schema JSON,
+    create_by       VARCHAR(64),
+    create_time     DATETIME DEFAULT CURRENT_TIMESTAMP,
+    update_by       VARCHAR(64),
+    update_time     DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    is_deleted      TINYINT(1) DEFAULT 0,
+    remarks         VARCHAR(500),
+    UNIQUE INDEX idx_operation_id (operation_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS emotion_museum.api_param (
+    id              VARCHAR(64) PRIMARY KEY,
+    endpoint_id     VARCHAR(64) NOT NULL,
+    param_type      VARCHAR(20) NOT NULL,
+    name            VARCHAR(100) NOT NULL,
+    required        TINYINT(1) DEFAULT 0,
+    param_type_def  VARCHAR(50),
+    description     VARCHAR(500),
+    default_value   VARCHAR(200),
+    enum_values     JSON,
+    example         VARCHAR(500),
+    INDEX idx_endpoint (endpoint_id),
+    FOREIGN KEY (endpoint_id) REFERENCES emotion_museum.api_endpoint(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

backend-single/src/main/java/com/emotion/service/impl/ApiEndpointServiceImpl.java

@@ -137,11 +137,12 @@ public class ApiEndpointServiceImpl implements ApiEndpointService {
                 JsonNode methods = pathEntry.getValue();
 
                 for (Iterator<String> it = methods.fieldNames(); it.hasNext(); ) {
-                    String method = it.next().toUpperCase();
+                    String methodKey = it.next();
+                    String method = methodKey.toUpperCase();
                     // Skip non-HTTP-method keys (e.g., summary, description at path level)
                     if (!isHttpMethod(method)) continue;
 
-                    JsonNode endpointNode = methods.get(method);
+                    JsonNode endpointNode = methods.get(methodKey);
 
                     String operationId = endpointNode.path("operationId").asText();
                     if (operationId.isEmpty()) continue;