ext: compile sqlite with WAL_SYNCHRONOUS=1 and --enable-fts5

See https://fractaledmind.github.io/2023/09/10/enhancing-rails-sqlite-optimizing-compilation/

ext/sqlite3/extconf.rb

@@ -49,13 +49,18 @@ def configure_system_libraries
 
       def configure_packaged_libraries
         minimal_recipe.tap do |recipe|
-          recipe.configure_options += ["--enable-shared=no", "--enable-static=yes"]
+          recipe.configure_options += [
+            "--enable-shared=no",
+            "--enable-static=yes",
+            "--enable-fts5",
+          ]
           ENV.to_h.tap do |env|
             user_cflags = with_config("sqlite-cflags")
             more_cflags = [
               "-fPIC", # needed for linking the static library into a shared library
               "-O2", # see https://github.com/sparklemotion/sqlite3-ruby/issues/335 for some benchmarks
               "-fvisibility=hidden", # see https://github.com/rake-compiler/rake-compiler-dock/issues/87
+              "-DSQLITE_DEFAULT_WAL_SYNCHRONOUS=1",
             ]
             env["CFLAGS"] = [user_cflags, env["CFLAGS"], more_cflags].flatten.join(" ")
             recipe.configure_options += env.select { |k,v| ENV_ALLOWLIST.include?(k) }