spec: finalize wealth-ledger SDD migration

openspec/changes/archive/2026-10-09-reconcile-hourly-investment-sync/system-analysis/sequences/hourly-investment-walk.mmd

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+sequenceDiagram
+  participant Scheduler
+  participant DB as Durable reservation/status
+  participant TB as T-Bank and public sources
+  participant Store as Local resource store
+  participant API as Resource GET
+
+  Scheduler->>DB: Reserve current connection walk
+  alt Due and no walk running
+    DB-->>Scheduler: Attempt with connection revision
+    Scheduler->>TB: Refresh membership, portfolios, mutable operations, events
+    Scheduler->>Store: Publish each complete successful result for the same revision
+    Scheduler->>DB: Settle succeeded, partial, or failed with safe failed sections
+  else Not due or an attempt is running
+    DB-->>Scheduler: No work
+  end
+  API->>Store: Read persisted result and attempt status
+  Store-->>API: Last confirmed data and metadata

openspec/changes/archive/2026-10-09-reconcile-hourly-investment-sync/system-analysis/sequences/read-only-resource-get.mmd

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+sequenceDiagram
+  actor User
+  participant UI as Frontend
+  participant API as Backend resource GET
+  participant DB as Local store
+  participant TB as T-Bank
+
+  User->>UI: Open screen or retry HTTP read
+  UI->>API: GET resource
+  API->>DB: Authorize current connection and read saved result/status
+  DB-->>API: data, resource state, last hourly attempt
+  API-->>UI: 200 { data, meta } or boundary Problem Details
+  Note over API,TB: No T-Bank call and no personal sync work from GET or retry