Expand Go slop pattern coverage

[avifenesh]

Context

Go currently has only 2 language-specific patterns (placeholder_panic_go, empty_catch_js partially). For a language this common in the AI tooling ecosystem, coverage is far too thin.

Patterns to add

Debugging

• fmt.Println / fmt.Printf debugging statements (not in test files)
• log.Println / log.Printf left from debugging (context-dependent)
• spew.Dump / pp.Println debug pretty-printers

Placeholders

• // TODO: implement with empty function body
• Functions returning only zero values with a TODO comment

Error handling

• if err != nil { } - empty error check blocks
• _ = someFunc() - explicitly discarded errors (outside known-safe cases)

Code smells

• interface{} / any overuse in function signatures (heuristic)
• Bare os.Exit() outside main

Implementation

• Add patterns to slop-patterns.js with language: 'go'
• Add .go multi-pass support in slop-analyzers.js (COMMENT_SYNTAX, EXPORT_PATTERNS already exist)
• Add golangci-lint integration in Phase 2 (cli-enhancers.js - scaffold exists but needs patterns)

Acceptance

• 8+ Go-specific patterns
• Tests for each pattern (true positive + false positive cases)
• npm test passes

[avifenesh]

[DONE] Task Completed Successfully

PR: #24
Status: Merged to main
Commit: 984be2a

Summary

• 8 new Go-specific slop detection patterns (9 total)
• golangci-lint CLI integration in Phase 2 pipeline
• Comprehensive test suite with 82 Go-specific tests
• Regex backtracking hardening
• Documentation updated (CHANGELOG, slop-categories)

This issue was automatically processed by the /next-task workflow.