chore: bump Go to 1.26.6, refresh example go.mod pins

Bumps the go directive to 1.26.6 across the main module and both
standalone example modules (preset-management, navigation-station-demo),
plus the builder image in Dockerfile and the three mock-service images
in docker-compose.ci.yml.

Also refreshes the examples' require github.com/gesellix/bose-soundtouch
pin from the stale v0.118.0 to the current v0.123.0 release tag (the
replace directive means they build against local source regardless,
but the pin should still track reality). go mod tidy run in all three
modules; no other dependency changes.

Dockerfile

@@ -1,5 +1,5 @@
 # Build stage
-FROM --platform=$BUILDPLATFORM golang:1.26.5-alpine AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26.6-alpine AS builder
 
 # Declare automatic platform ARGs to make them available in build stage
 # See https://docs.docker.com/reference/dockerfile#automatic-platform-args-in-the-global-scope

docker-compose.ci.yml

@@ -35,7 +35,7 @@ services:
       start_period: 3s
 
   spotify-mock:
-    image: golang:1.26.5-alpine
+    image: golang:1.26.6-alpine
     container_name: spotify-mock
     working_dir: /app
     volumes:
@@ -53,7 +53,7 @@ services:
       start_period: 3s
 
   amazon-mock:
-    image: golang:1.26.5-alpine
+    image: golang:1.26.6-alpine
     container_name: amazon-mock
     working_dir: /app
     volumes:
@@ -71,7 +71,7 @@ services:
       start_period: 3s
 
   tunein-mock:
-    image: golang:1.26.5-alpine
+    image: golang:1.26.6-alpine
     container_name: tunein-mock
     working_dir: /app
     volumes:

examples/navigation-station-demo/go.mod

@@ -1,8 +1,8 @@
 module navigation-station-demo
 
-go 1.26.5
+go 1.26.6
 
-require github.com/gesellix/bose-soundtouch v0.118.0
+require github.com/gesellix/bose-soundtouch v0.123.0
 
 require github.com/gorilla/websocket v1.5.3 // indirect
 

examples/preset-management/go.mod

@@ -1,8 +1,8 @@
 module preset-management-example
 
-go 1.26.5
+go 1.26.6
 
-require github.com/gesellix/bose-soundtouch v0.118.0
+require github.com/gesellix/bose-soundtouch v0.123.0
 
 require github.com/gorilla/websocket v1.5.3 // indirect
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/gesellix/bose-soundtouch
 
-go 1.26.5
+go 1.26.6
 
 require (
 	filippo.io/age v1.3.1