fix(bin): remove legacy remote snapshot reads

bin/fm-bearings-snapshot.sh

@@ -130,7 +130,7 @@ For every registered secondmate, readable structured facts from its own home are
   authoritative, including independently trustworthy surfaces from a partial summary.
   Parent events and bounded terminal reads are labeled fallback or contradiction
   evidence and never become current work. The provenance and freshness fields
-  distinguish live ledgers, cached ledgers, and mixed-fleet summary fallbacks.
+  distinguish live and cached ledgers; a home without either is explicitly unreadable.
 Opt-in surfaces: --fields bodies|paths|actions|endpoints, --all-in-flight,
   --all-decisions, --all-secondmates, --all-landed, --all-reports, --all-queued, --all-recorded-prs,
   --all-unhealthy, --all-pr-repos, --include-prs (adds candidate_prs).
@@ -485,7 +485,7 @@ MODEL=$(printf '%s' "$SNAP" | jq \
         (if $all_queued == 1 then empty else {surface:"superseded or prose-deferred queued items", reveal:"--all-queued"} end),
         (if $all_landed == 0 and ($per_home_capped | length) > ($done | length) then {surface:("landed showing \($done | length) of \($per_home_capped | length)" + (($done | map(.home_id) | unique | map(select(. != "(main)")) | length) as $k | if $k > 0 then " (incl. \($k) secondmate home(s))" else "" end)), reveal:"--all-landed"} else empty end),
         (if $all_landed == 0 and $home_cap_dropped > 0 then {surface:("landed per-home capped at \($landed_per_home_n) for \($home_cap_dropped) home(s)"), reveal:"--all-landed"} else empty end),
-        (if (($snap.secondmate_landed.unreadable // []) | length) > 0 then {surface:("secondmate home(s) with unreadable backlog: \(($snap.secondmate_landed.unreadable // []) | length)"), reveal:"inspect the listed secondmate home backlogs"} else empty end),
+        (if (($snap.secondmate_landed.unreadable // []) | length) > 0 then {surface:("secondmate home(s) with unreadable structured state: \(($snap.secondmate_landed.unreadable // []) | length)"), reveal:"inspect the listed secondmate home ledgers"} else empty end),
         (if $all_landed == 0 and (($snap.secondmate_landed.truncated // []) | length) > 0 then {surface:("secondmate home Done capped at the snapshot layer for \(($snap.secondmate_landed.truncated // []) | length) home(s)"), reveal:"--all-landed"} else empty end),
         ((($snap.main_inventory.orphan_in_flight // []) | length) as $n
          | if $n > 0 then {surface:("main in-flight backlog item(s) have no child metadata: \($n)"), reveal:"inspect main data/backlog.md In flight vs state/*.meta"} else empty end),
@@ -500,9 +500,6 @@ MODEL=$(printf '%s' "$SNAP" | jq \
         (($snap.secondmate_current.records // [])[]
          | select(.provenance.summary_source == "remote-ledger-cache")
          | {surface:("secondmate " + .id + " served from cached home ledger"),reveal:"inspect the home ledger publication and remote route"}),
-        (($snap.secondmate_current.records // [])[]
-         | select(.provenance.summary_source == "legacy-remote-summary" or .provenance.summary_source == "legacy-local-summary")
-         | {surface:("secondmate " + .id + " used mixed-fleet summary fallback"),reveal:"publish state/home-summary.json in that home"}),
         (([($snap.secondmate_current.records // [])[] | select(.parent_event.activity_scan.input_truncated == true or .parent_event.activity_scan.retained_truncated == true)] | length) as $n | if $n > 0 then {surface:("secondmate parent activity evidence truncated for \($n) record(s)"), reveal:"raise FM_SNAPSHOT_PARENT_ACTIVITY_LINES, FM_SNAPSHOT_PARENT_ACTIVITY_BYTES, or FM_SNAPSHOT_PARENT_ACTIVITIES"} else empty end),
         (([($snap.secondmate_current.records // [])[] | select(.parent_event.activity_scan.available == false)] | length) as $n | if $n > 0 then {surface:("secondmate parent activity evidence unavailable for \($n) record(s)"), reveal:"inspect the parent status logs"} else empty end),
         (if $all_decisions == 0 and ($decisions_all | length) > $decisions_n then {surface:("decisions_open showing \($decisions_n) of \($decisions_all | length)"), reveal:"--all-decisions"} else empty end),