chore(deps): bump golang from 1.24 to 1.26 in /engine

Bumps golang from 1.24 to 1.26.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: '1.26'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

engine/Dockerfile.dblab-server-debug

@@ -1,7 +1,7 @@
 # How to start a container: https://postgres.ai/docs/how-to-guides/administration/engine-manage
 
 # Compile stage
-FROM golang:1.24 AS build-env
+FROM golang:1.26 AS build-env
 
 # Build Delve
 RUN go install github.com/go-delve/delve/cmd/dlv@latest