v0.3.0

Changelog

• 26ef89c feat(auth): add device flow login, structured User-Agent, and context propagation
• 8affa22 feat: add --debug flag and CNAP_DEBUG env var with slog + HTTP tracing
• 534a5d0 feat: add --limit and --cursor pagination flags to all list commands
• 3ba1ee4 feat: add install create, update-values, and update-overrides CLI commands
• dcf4693 feat: add registry credential CLI commands
• 2d5b979 fix: remove duplicate /v1 prefix from API client base URL
• 437467a fix: remove redundant type annotation (staticcheck ST1023)
• 50e5d87 fix: resolve golangci-lint errors (errcheck, gocritic, gofmt)