新增场地展位管理功能，包括展位图查询、保存、预定及调换功能，新增相关数据模型及数据库表结构

sql/cms_venue_booth_map.sql

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+-- 场地展位图与户外招聘会展位预定
+-- 瀚高数据库 / PostgreSQL 兼容
+
+CREATE SEQUENCE IF NOT EXISTS "cms_venue_booth_id_seq" START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1;
+CREATE TABLE IF NOT EXISTS "cms_venue_booth" (
+    "id" BIGINT NOT NULL DEFAULT nextval('"cms_venue_booth_id_seq"') PRIMARY KEY,
+    "venue_id" BIGINT NOT NULL,
+    "booth_number" VARCHAR(50) NOT NULL,
+    "position_x" INTEGER NOT NULL DEFAULT 0,
+    "position_y" INTEGER NOT NULL DEFAULT 0,
+    "create_by" VARCHAR(64) DEFAULT '',
+    "create_time" TIMESTAMP(0),
+    "update_by" VARCHAR(64) DEFAULT '',
+    "update_time" TIMESTAMP(0),
+    "remark" VARCHAR(500),
+    "del_flag" CHAR(1) DEFAULT '0'
+);
+
+COMMENT ON TABLE "cms_venue_booth" IS '场地展位图';
+COMMENT ON COLUMN "cms_venue_booth"."venue_id" IS '场地ID';
+COMMENT ON COLUMN "cms_venue_booth"."booth_number" IS '展位号';
+COMMENT ON COLUMN "cms_venue_booth"."position_x" IS 'X坐标';
+COMMENT ON COLUMN "cms_venue_booth"."position_y" IS 'Y坐标';
+
+CREATE UNIQUE INDEX IF NOT EXISTS "uk_cms_venue_booth_number" ON "cms_venue_booth" ("venue_id", "booth_number");
+CREATE INDEX IF NOT EXISTS "idx_cms_venue_booth_venue" ON "cms_venue_booth" ("venue_id");
+
+CREATE SEQUENCE IF NOT EXISTS "cms_outdoor_fair_booth_booking_id_seq" START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1;
+CREATE TABLE IF NOT EXISTS "cms_outdoor_fair_booth_booking" (
+    "id" BIGINT NOT NULL DEFAULT nextval('"cms_outdoor_fair_booth_booking_id_seq"') PRIMARY KEY,
+    "fair_id" BIGINT NOT NULL,
+    "booth_id" BIGINT NOT NULL,
+    "booth_number" VARCHAR(50) NOT NULL,
+    "company_id" BIGINT,
+    "company_name" VARCHAR(200),
+    "status" VARCHAR(30) DEFAULT 'reserved',
+    "create_by" VARCHAR(64) DEFAULT '',
+    "create_time" TIMESTAMP(0),
+    "update_by" VARCHAR(64) DEFAULT '',
+    "update_time" TIMESTAMP(0),
+    "remark" VARCHAR(500),
+    "del_flag" CHAR(1) DEFAULT '0'
+);
+
+COMMENT ON TABLE "cms_outdoor_fair_booth_booking" IS '户外招聘会展位预定';
+CREATE UNIQUE INDEX IF NOT EXISTS "uk_cms_outdoor_fair_booth_booking" ON "cms_outdoor_fair_booth_booking" ("fair_id", "booth_id");
+CREATE INDEX IF NOT EXISTS "idx_cms_outdoor_fair_booth_booking_fair" ON "cms_outdoor_fair_booth_booking" ("fair_id");
+
+WITH target_venue AS (
+    SELECT "id" AS venue_id
+    FROM "cms_venue_info"
+    WHERE "venue_name" = '石河子市人民广场户外招聘区'
+    LIMIT 1
+),
+seed AS (
+    SELECT
+        target_venue.venue_id,
+        'KJ' || LPAD(gs::text, 2, '0') AS booth_number,
+        40 + ((gs - 1) % 20) * 54 AS position_x,
+        40 + ((gs - 1) / 20) * 54 AS position_y
+    FROM target_venue
+    CROSS JOIN generate_series(1, 80) gs
+)
+INSERT INTO "cms_venue_booth" ("venue_id", "booth_number", "position_x", "position_y", "create_by", "create_time", "del_flag")
+SELECT seed.venue_id, seed.booth_number, seed.position_x, seed.position_y, 'system', NOW(), '0'
+FROM seed
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM "cms_venue_booth" existing
+    WHERE existing."venue_id" = seed.venue_id
+      AND existing."booth_number" = seed.booth_number
+);
+
+UPDATE "cms_venue_info" venue
+SET "floor_count" = booth_counts.total
+FROM (
+    SELECT "venue_id", COUNT(*) AS total
+    FROM "cms_venue_booth"
+    GROUP BY "venue_id"
+) booth_counts
+WHERE venue."id" = booth_counts."venue_id";
+
+UPDATE "cms_outdoor_fair" fair
+SET "booth_count" = venue."floor_count"
+FROM "cms_venue_info" venue
+WHERE fair."venue_id" = venue."id";