fix(runtime): align update version and host errors

[samzong]

Summary

• Make update compare the same VersionInfo() value reported by version commands.
• Return host-specific actionable authentication errors when a resolved host has no credentials.

Verification

• go test -count=1 ./pkg/lathe -run TestRunGitHubUpdateUsesReportedVersion
• go test -count=1 ./pkg/runtime -run TestLoadHostOptions_UnknownExplicitHostIsActionable
• make check
• go test -race -count=1 ./...
• Rebuilt Tokener against this Lathe checkout and verified that a control-character hostname stays inside a valid JSON error envelope with exit code 4.

Compatibility

No catalog schema or generated command shape changes. Update checks now honor Go module build information, and missing-host errors keep not_authenticated, exit code 4, and errors.Is(ErrNotAuthenticated) while improving the message and hint.

Checklist

• Tests or focused verification cover the changed surface.
• User-facing behavior changes are documented in this PR.
• Generated output under internal/generated/, .cache/, and ad-hoc skills/<cli-name>/ directories is not committed.
• Commits are signed off when this is ready to merge.

[codspeed-hq]

Merging this PR will degrade performance by 22.08%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

❌ 21 regressed benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
❌	yaml	3.7 ms	5.4 ms	-31.02%
❌	small	107.6 µs	144 µs	-25.3%
❌	json-small	193 µs	256 µs	-24.61%
❌	BenchmarkFindCatalogCommand	6.5 µs	8.6 µs	-24.27%
❌	BenchmarkCatalogJSON	2.3 ms	3 ms	-23.74%
❌	small	149.2 µs	194.6 µs	-23.32%
❌	large	1.9 ms	2.4 ms	-23.23%
❌	json	990.7 µs	1,283.8 µs	-22.84%
❌	large	1.8 ms	2.3 ms	-22.75%
❌	BenchmarkParseNormalize	4.8 ms	6.2 ms	-22.5%
❌	yaml-large	12.5 ms	16 ms	-22.17%
❌	BenchmarkFormatTableInferredColumns	727.2 µs	934.1 µs	-22.15%
❌	large	1.3 ms	1.6 ms	-21.52%
❌	miss	3 ms	3.7 ms	-21.03%
❌	table	577.2 µs	729.7 µs	-20.9%
❌	hit	3 ms	3.8 ms	-20.66%
❌	small	83.4 µs	104.3 µs	-20.08%
❌	json-large	2.8 ms	3.4 ms	-19.4%
❌	small	113.7 µs	140.9 µs	-19.29%
❌	large	1.1 ms	1.3 ms	-18.75%
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing fix/update-host-errors (0a99ecb) with main (690d397)}