hammer-upgrade: upgrades atómicos con generaciones y rollback (Etapa E4, primer corte)
Crate hammer-upgrade + CLI 'hammer upgrade apply|rollback|status'. Aplica un árbol Stage1/producto del store sobre el FHS vivo dejando una generación (manifest + backup de bytes previos), atómico fichero-a-fichero con 'current' como commit-point. Rollback restaura EXACTO al árbol anterior (o pre-upgrades). Cada cambio al journal (HammerHydrate, replay-able). Verificación opcional del of_tree esperado (índice de mirror E3 / release firmada). Maneja ficheros + symlinks. 7 tests unitarios + scripts/upgrade-e2e-test.sh (apply v1->v2-> rollback->rollback contra el binario real). SDD 13 actualizado. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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@@ -545,6 +545,7 @@ dependencies = [
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"hammer-journal",
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"hammer-mirror",
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"hammer-overlay",
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"hammer-upgrade",
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"hex",
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"serde_json",
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"sha2",
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@@ -613,6 +614,20 @@ dependencies = [
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"tracing-subscriber",
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]
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[[package]]
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name = "hammer-upgrade"
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version = "0.0.1"
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dependencies = [
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"anyhow",
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"hammer-core",
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"hammer-journal",
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"serde",
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"serde_json",
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"tempfile",
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"thiserror",
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"tracing",
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]
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[[package]]
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name = "hammerd"
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version = "0.0.1"
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