chore: remove traefik duration types

[steveiliop56]

Summary by CodeRabbit

• Refactor

  • Removed custom duration type implementation and consolidated duration handling to use standard time.Duration exclusively across parsing, encoding, and decoding operations.
  • Simplified internal conversion logic by eliminating special-case handling for the custom duration type.

• Documentation

  • Removed documentation references to custom duration type, including configuration examples and usage patterns.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 288ef416-5bf1-4930-ada4-c36f1d25a483

📥 Commits

Reviewing files that changed from the base of the PR and between 902cee6 and 7fa6af5.

📒 Files selected for processing (8)

• README.md
• flag/flag_test.go
• parser/element_fill.go
• parser/element_fill_test.go
• parser/flat_encode.go
• parser/flat_encode_test.go
• types/duration.go
• types/duration_test.go

💤 Files with no reviewable changes (8)

• README.md
• parser/flat_encode_test.go
• flag/flag_test.go
• types/duration_test.go
• parser/element_fill.go
• parser/flat_encode.go
• parser/element_fill_test.go
• types/duration.go

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📝 Walkthrough

Walkthrough

This PR removes the custom types.Duration type and all references to it across the codebase. The custom type that supported integer seconds or duration-format strings is deleted from the types package, along with its implementation, tests, documentation, and integration points in the parser and encoder modules.

Changes

Cohort / File(s)	Summary
Custom Type Implementation types/duration.go, types/duration_test.go	Removes the custom Duration type definition and all associated methods (Set, String, MarshalText, UnmarshalText, MarshalJSON, UnmarshalJSON), plus comprehensive test coverage for parsing, encoding, and round-trip serialization.
Parser Integration parser/element_fill.go, parser/element_fill_test.go, parser/flat_encode.go, parser/flat_encode_test.go	Removes the types package import and eliminates special-case handling for types.Duration in duration parsing and encoding logic. Built-in time.Duration handling is retained.
Documentation & Test Coverage README.md, flag/flag_test.go	Removes documentation describing the custom Duration type capabilities and removes corresponding test cases from the flag package tests.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~15 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title 'chore: remove traefik duration types' directly relates to the main change: removing the custom types.Duration implementation and all associated code across multiple files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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