Explicitly test that SQLite version 3.31.1 is compatible with sqlite-vec when statically compiling

tests/minimum/demo.c

@@ -0,0 +1,26 @@
+#include "sqlite3.h"
+#include "sqlite-vec.h"
+#include <stdio.h>
+#include <unistd.h>
+#include <assert.h>
+
+int main(int argc, char *argv[]) {
+  int rc = SQLITE_OK;
+  sqlite3 *db;
+  sqlite3_stmt *stmt;
+
+  rc = sqlite3_auto_extension((void (*)())sqlite3_vec_init);
+  assert(rc == SQLITE_OK);
+
+  rc = sqlite3_open(":memory:", &db);
+  assert(rc == SQLITE_OK);
+
+  rc = sqlite3_prepare_v2(db, "SELECT sqlite_version(), vec_version()", -1, &stmt, NULL);
+  assert(rc == SQLITE_OK);
+
+  rc = sqlite3_step(stmt);
+  printf("sqlite_version=%s, vec_version=%s\n", sqlite3_column_text(stmt, 0), sqlite3_column_text(stmt, 1));
+  sqlite3_finalize(stmt);
+  sqlite3_close(db);
+  return 0;
+}