docs: V14 provisioning plane, X13 security groups, empty-list 550, VersionId

[AdaWorldAPI]

Doc-only, recording four decisions from 2026-10-11:

• V14 (decision 1(c)): the "Open (code)" item is decided. Delivery resolution keeps its owner planes; the Entra-wide uniqueness rule is a separate provisioning plane (validate::provisioning_conflicts, lance-graph #1477) that lists claimants without picking the quarantined one. Fidelity limit recorded: contacts, public folders and other object kinds are not observed.
• X13 (decision 7): a mail-enabled security group's membership carries its ACL grants, not its address; the member's own directory decides (Stalwart docs: OpenProject transcoding — Rails 8 AR + concerns under ogit-op:: #14).
• Fidelity exception (decision 6(a)): an empty list expansion is rejected with 550, where Exchange accepts and drops the mail. Kept on purpose.
• VersionId (decision 3(b)): the doc comment said it maps 1:1 onto a Lance dataset version; it now says the logical clock stays independent of the physical commit version, since one commit may carry several logical versions.

No behaviour change. cargo fmt --check -p ogar-dir-sim clean.

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https://claude.ai/code/session_01G22yT6htkcdyXsihxxXdrg

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-11T09:23:35.119239Z	24fcb31	Draft marked ready

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📒 Files selected for processing (2)

• crates/ogar-dir-sim/src/provenance.rs
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