fix: improve locking

Dockerfile

@@ -165,7 +165,7 @@ ENV GO_PATH=/usr/local/go/bin/go
 RUN apt-get -y update && apt-get install -y curl nodejs npm
 
 # go build is slower the first time it is ran, so we prewarm it in the build
-RUN mkdir -p /tmp/gobuildwarm && cd /tmp/gobuildwarm && go mod init gobuildwarm && printf "package foo\nimport (\"fmt\"\nwmill \"github.com/windmill-labs/windmill-go-client\")\nfunc main() { v := wmill.GetStatePath()\n fmt.Println(v) }" > warm.go && go mod tidy && go build -x && rm -rf /tmp/gobuildwarm
+RUN mkdir -p /tmp/gobuildwarm && cd /tmp/gobuildwarm && go mod init gobuildwarm && printf "package foo\nimport (\"fmt\")\nfunc main() { fmt.Println(v) }" > warm.go && go mod tidy && go build -x && rm -rf /tmp/gobuildwarm
 
 ENV TZ=Etc/UTC
 

backend/windmill-api/src/db.rs

@@ -166,6 +166,7 @@ pub async fn migrate(db: &DB) -> Result<(), Error> {
             tracing::error!("Database had been applied more migrations than this container. 
             This usually mean than another container on a more recent version migrated the database and this one is on an earlier version.
             Please update the container to latest. Not critical, but may cause issues if migration introduced a breaking change. Version missing: {e}");
+            custom_migrator.unlock().await?;
             Ok(())
         }
         Err(err) => Err(err),