fix(inspect): pre-existing golangci-lint issues in inspect package (44 staticcheck, 4 goconst)

[CodeMonkeyCybersecurity]

Context

Running `golangci-lint run ./pkg/inspect/` reports 51 issues, none in `docker.go` (fixed in #103) but many in surrounding files.

Issues

• 44 staticcheck QF1012: `WriteString(fmt.Sprintf(...))` should be `fmt.Fprintf(...)` in output.go and terraform_modular.go
• 4 goconst: repeated strings should be constants (`bridge`, `active`, `UUID`, `psql`)
• 1 errcheck: unchecked `filepath.Glob` error in services.go
• 1 gosec G204: subprocess launched with variable in inspector.go
• 7 ST1000: missing package comments

Priority

P2 - these are code quality issues, not functional bugs.

Scope

• Fix QF1012 warnings in output.go and terraform_modular.go
• Extract string constants (bridge, host, none, active)
• Handle filepath.Glob error
• Add package doc comment (already done for docker.go in fix(inspect): harden Docker discovery with batched inspect, fix find, add tests #103)