fix: update enumer calls to use Go 1.24 tool management

Fixes the goreleaser workflow that was failing for v0.22.0 release.

Problem:
- Goreleaser failed with 'enumer: executable file not found in $PATH'
- The workflow runs 'go generate ./...' which requires the enumer tool

Solution:
- Updated goreleaser workflow to install tools using 'go install tool'
- Added Go version 1.24 specification for tool management support
- Updated all 5 go:generate directives from 'enumer' to 'go tool enumer'
- Follows the same pattern used in the Makefile's build-tools target

This ensures enumer is properly available in CI environment through Go's
tool management system, consistent with Go 1.24's tool directive approach.

Relates to failed v0.22.0 release: https://github.com/apstndb/spanner-mycli/actions/runs/16889732016

Author: apstndb

.github/workflows/goreleaser.yml

@@ -18,6 +18,11 @@ jobs:
           fetch-depth: 0
       - name: Set up Go
         uses: actions/setup-go@v5
+        with:
+          go-version: '1.24'
+      - name: Install tools
+        run: |
+          go install tool
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v6
         with:

enums/enums.go

@@ -2,7 +2,7 @@ package enums
 
 // DisplayMode represents different output display formats
 //
-//go:generate enumer -type=DisplayMode -trimprefix=DisplayMode -transform=snake_upper
+//go:generate go tool enumer -type=DisplayMode -trimprefix=DisplayMode -transform=snake_upper
 type DisplayMode int
 
 const (
@@ -19,7 +19,7 @@ const (
 
 // AutocommitDMLMode represents the DML autocommit behavior
 //
-//go:generate enumer -type=AutocommitDMLMode -trimprefix=AutocommitDMLMode -transform=snake_upper
+//go:generate go tool enumer -type=AutocommitDMLMode -trimprefix=AutocommitDMLMode -transform=snake_upper
 type AutocommitDMLMode int
 
 const (
@@ -29,7 +29,7 @@ const (
 
 // ParseMode represents statement parsing behavior
 //
-//go:generate enumer -type=ParseMode -trimprefix=ParseMode -transform=snake_upper
+//go:generate go tool enumer -type=ParseMode -trimprefix=ParseMode -transform=snake_upper
 type ParseMode int
 
 const (
@@ -41,7 +41,7 @@ const (
 
 // ExplainFormat represents EXPLAIN output format
 //
-//go:generate enumer -type=ExplainFormat -trimprefix=ExplainFormat -transform=snake_upper
+//go:generate go tool enumer -type=ExplainFormat -trimprefix=ExplainFormat -transform=snake_upper
 type ExplainFormat int
 
 const (
@@ -53,7 +53,7 @@ const (
 
 // StreamingMode represents the streaming output mode.
 //
-//go:generate enumer -type=StreamingMode -trimprefix=StreamingMode -transform=snake_upper
+//go:generate go tool enumer -type=StreamingMode -trimprefix=StreamingMode -transform=snake_upper
 type StreamingMode int
 
 const (