fix(notify): complete inbound coverage (escalation_response, object_revoke, profile_share)

[antonyevans]

What

Completes inbound notification coverage so no user-facing inbound type arrives silently.

Review: coverage matrix

Edge Book has 12 envelope types. The inbound dispatcher (receiveEnvelope) applies 10 of them (the other two, ack/error, are protocol-level and never dispatched). Before this PR the notify policy table covered 7:

Type	Notifies?
friend_request	✅ already
friend_response	✅ already
privileged_message	✅ already
object_share	✅ already
escalation	✅ already
support_bundle	✅ already
post_publish	✅ already (0.18.3)
escalation_response	➕ added — a friend's answer to a decision you raised (high signal)
object_revoke	➕ added — a friend revoked access to something they shared
profile_share	➕ added — a deliberate profile broadcast (manual command, not auto housekeeping)
ack / error	— protocol-level, intentionally silent

Posts (the post_publish sub-taxonomy)

No per-post-type work needed: a single post_publish policy already covers every post sub-type — signal, query, answer, endorse, coordinate, share, delegation_request, capability_advertisement, result_attestation — because it keys on post.post_type generically. A friend's broadcast feed post is delivered as a post_publish envelope, so it's covered by the same watcher as a direct message (push model; the local feed = the store of received post_publish items).

Tests

• Positive notificationIntent cases for escalation_response, object_revoke, profile_share.
• The two "silent type" tests now use ack (a genuine protocol frame) instead of profile_share.
• npm test → 511 pass; typecheck/lint/sync-readme clean.

Note

profile_share also rides along the friend handshake (each side exchanges a profile), so friending now emits an "accepted" notification followed by a "shared a profile" one. It can be suppressed per-agent via the notify_types whitelist if that's too chatty. README updated to list the complete coverage. Bumps to 0.18.5.

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