fix(gitignore): make api ignore pattern root-specific

fix(test): add missing os import to test files
chore(deps): update dependencies from go mod tidy

go.mod

@@ -2,9 +2,9 @@ module trip-planner
 
 go 1.26.4
 
+require github.com/go-redis/redis/v8 v8.11.5
+
 require (
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
-	github.com/go-redis/redis/v8 v8.11.5 // indirect
-	github.com/jmoiron/sqlx v1.4.0 // indirect
 )