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

tests/minimum/.gitignore

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+dist/

tests/minimum/Makefile

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+#curl -q -o sqlite-amalgamation-3310100.zip https://www.sqlite.org/2020/sqlite-amalgamation-3310100.zip
+#unzip https://www.sqlite.org/2020/sqlite-amalgamation-3310100.zip
+
+dist/:
+	mkdir -p dist
+	touch $@
+
+dist/sqlite-amalgamation-3310100: dist/
+	rm -rf sqlite-amalgamation-3310100/ || true
+	curl -q -o sqlite-amalgamation-3310100.zip https://www.sqlite.org/2020/sqlite-amalgamation-3310100.zip
+	unzip -d dist/ sqlite-amalgamation-3310100.zip
+	rm sqlite-amalgamation-3310100.zip
+	touch $@
+
+dist/t3310100: demo.c dist/sqlite-amalgamation-3310100
+	gcc \
+		-DSQLITE_CORE \
+		-I dist/sqlite-amalgamation-3310100 \
+		-I ../../ \
+		$< dist/sqlite-amalgamation-3310100/sqlite3.c \
+		../../sqlite-vec.c \
+		-o $@
+
+test:
+	make dist/t3310100
+	./dist/t3310100

tests/minimum/demo.c

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+#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;
+}