Update Go version to 1.26

[donatj]

Updated Go version from 1.24 to 1.26 in go.mod.

[donatj]

@copilot run "go fix ./..." In the latest version of Go 1.26

[Copilot]

🟡 Not ready to approve

The PR removes the toolchain pin (a behavior/reproducibility change) but the description only mentions updating the Go version, so it should be either restored/updated or explicitly justified.

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Pull request overview

Updates the module’s declared Go version in go.mod to target Go 1.26.

Changes:

• Bumped go directive from 1.24 to 1.26.
• Removed the toolchain directive that previously pinned a specific Go toolchain version.

File summaries

File	Description
go.mod	Updates the module’s Go version declaration (and removes the pinned toolchain line).

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 1
• Review effort level: Lite

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[Copilot]

@copilot run "go fix ./..." In the latest version of Go 1.26

Done. go fix ./... was run and applied the following changes:

• detail.go / parser.go: Replaced string concatenation (s += ...) with strings.Builder
• scanner.go: Replaced manual byte-search loops with slices.Contains

All tests pass. Commit: run go fix ./... for Go 1.26