docs(project): add reference Python/Flask implementation

Previous version of Tanabata used as visual and functional reference
for the new Go + SvelteKit rewrite.

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

docs/reference/backend/cmd/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"tanabata/internal/storage/postgres"
+)
+
+func main() {
+	postgres.InitDB("postgres://hiko:taikibansei@192.168.0.25/Tanabata_new?application_name=Tanabata%20testing")
+	// test_json := json.RawMessage([]byte("{\"valery\": \"ponosoff\"}"))
+	// data, statusCode, err := db.FileGetSlice(1, "", "+2", -2, 0)
+	// data, statusCode, err := db.FileGet(1, "0197d056-cfb0-76b5-97e0-bd588826393c")
+	// data, statusCode, err := db.FileAdd(1, "ABOBA.png", "image/png", time.Now(), "slkdfjsldkflsdkfj;sldkf", test_json)
+	// statusCode, err := db.FileUpdate(2, "0197d159-bf3a-7617-a3a8-a4a9fc39eca6", map[string]interface{}{
+	// 	"name": "ponos.png",
+	// })
+	// statusCode, err := db.FileDelete(1, "0197d155-848f-7221-ba4a-4660f257c7d5")
+	// v, e, err := postgres.FileGetAccess(1, "0197d15a-57f9-712c-991e-c512290e774f")
+	// fmt.Printf("V: %s, E: %s\n", v, e)
+	// fmt.Printf("Status: %d\n", statusCode)
+	// fmt.Printf("Error:  %s\n", err)
+	// fmt.Printf("%+v\n", data)
+}

docs/reference/backend/cmd/main.sync-conflict-20251008-195720-BYUI6ZC.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+
+	"tanabata/db"
+)
+
+func main() {
+	db.InitDB("postgres://hiko:taikibansei@192.168.0.25/Tanabata_new?application_name=Tanabata%20testing")
+	// test_json := json.RawMessage([]byte("{\"valery\": \"ponosoff\"}"))
+	// data, statusCode, err := db.FileGetSlice(2, "", "+2", -2, 0)
+	// data, statusCode, err := db.FileGet(1, "0197d056-cfb0-76b5-97e0-bd588826393c")
+	// data, statusCode, err := db.FileAdd(1, "ABOBA.png", "image/png", time.Now(), "slkdfjsldkflsdkfj;sldkf", test_json)
+	// statusCode, err := db.FileUpdate(2, "0197d159-bf3a-7617-a3a8-a4a9fc39eca6", map[string]interface{}{
+	// 	"name": "ponos.png",
+	// })
+	statusCode, err := db.FileDelete(1, "0197d155-848f-7221-ba4a-4660f257c7d5")
+	fmt.Printf("Status: %d\n", statusCode)
+	fmt.Printf("Error:  %s\n", err)
+	// fmt.Printf("%+v\n", data)
+}