feat: Initialize Go backend module with dependencies and configure Docker build to use GOTOOLCHAIN=auto.

backend/go.mod

@@ -1,6 +1,8 @@
 module codex-pool
 
-go 1.23
+go 1.24.1
+
+toolchain go1.24.6
 
 require (
 	github.com/andybalholm/brotli v1.2.0
@@ -10,6 +12,7 @@ require (
 	github.com/chromedp/chromedp v0.14.2
 	github.com/go-rod/rod v0.116.2
 	github.com/go-rod/stealth v0.4.9
+	github.com/mattn/go-sqlite3 v1.14.33
 )
 
 require (
@@ -23,7 +26,6 @@ require (
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.4.0 // indirect
 	github.com/klauspost/compress v1.18.2 // indirect
-	github.com/mattn/go-sqlite3 v1.14.33 // indirect
 	github.com/orisano/pixelmatch v0.0.0-20230914042517-fa304d1dc785 // indirect
 	github.com/quic-go/qpack v0.6.0 // indirect
 	github.com/tam7t/hpkp v0.0.0-20160821193359-2b70b4024ed5 // indirect
@@ -36,5 +38,4 @@ require (
 	golang.org/x/net v0.48.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.32.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

backend/go.sum

@@ -85,6 +85,5 @@ golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
 golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=