classify db vs non-db files accordingly

[Pavan-Nambi]

if a file has content and we try to make a db with it we report it as corrupted but sqlite just says file aint no db

❯ cargo run asdfg.sql
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
     Running `target/debug/tursodb asdfg.sql`
Error: Corrupt database: invalid page size in database header: 0

❯ sqlite3 asdfg.sql
SQLite version 3.50.4 2025-07-30 19:33:53
Enter ".help" for usage hints.
sqlite> .tables
Error: file is not a database

 cat asdfg.sql
create me%                                                                      

[Pavan-Nambi]

Ok so i got curious on what sqlite does for a duckdb file same thing tho

❯ duckdb duckyy.db
DuckDB v1.4.1 (Andium) b390a7c376
Enter ".help" for usage hints.
D CREATE TABLE users (
      id INTEGER,
      name TEXT,
      email TEXT
  );
D
D -- Insert some data
D INSERT INTO users VALUES
  (1, 'Alice', 'alice@example.com'),
  (2, 'Bob', 'bob@example.com');
D
D -- Query the table
D SELECT * FROM users;
┌───────┬─────────┬───────────────────┐
│  id   │  name   │       email       │
│ int32 │ varchar │      varchar      │
├───────┼─────────┼───────────────────┤
│     1 │ Alice   │ alice@example.com │
│     2 │ Bob     │ bob@example.com   │
└───────┴─────────┴───────────────────┘
D .exit

turso on  HEAD (73cabf4) [$!?] is 📦 v0.3.0-pre.3 via 🐍 v3.12.3 via 🦀 v1.88.0 took 14s
❯ cargo run duckyy.db
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
     Running `target/debug/tursodb duckyy.db`
Error: Corrupt database: invalid page size in database header: 0

turso on  HEAD (73cabf4) [$!?] is 📦 v0.3.0-pre.3 via 🐍 v3.12.3 via 🦀 v1.88.0
❯ sqlite3 duckyy.db
SQLite version 3.50.4 2025-07-30 19:33:53
Enter ".help" for usage hints.
sqlite> .tables
Error: file is not a database
sqlite>