feat(storage): move desktop SQLite ownership into a storage utility process

Main no longer opens desktop business SQLite. A single utility-process
storage owner holds the Assistant, Knowledge, attachment, document-result,
remote-binding and native model-ledger databases and runs whole domain
transactions; Main and Runtime callers use explicit async domain operations.

- Remove the Main readWithFallback path and the supervision worker's
  separate business write connection; manifests are scanned read-only and
  committed by the sole writer.
- Remote events are ACKed only after commit; process loss reports
  unconfirmed writes instead of replaying them.
- Use native utilityProcess messaging with one in-flight bound (32) and
  ordered waiting instead of capacity rejection and retries.
- Start the storage process before the window so startup overlaps.
- Keep short tool output in memory and store full output once in owned
  storage; paging, branching, restart and deletion reuse that copy.
- Put required runtime launch files under goodbuddy-prefixed owned temp
  directories and reclaim confirmed stale ones; stop writing duplicate
  parsed.md.
- Add lint guards for SQLite ownership and architecture, concurrency
  acceptance fixtures, and maintenance/architecture documentation.

Validation: typecheck and lint pass. Alternating baseline (edf019aa) vs
candidate runs show no regression on single-session, C01, C02, C04 and a
5-minute C06; Main p99 drops from ~21 ms to ~16.7 ms under concurrency.
Fresh portable copy (1.75M events) upgrade content unchanged; real-model
output paging passes with 4 external requests. Full npm test runs had
1-9 different timing-sensitive failures per run that pass when rerun.
Not covered: C03 review publication, C07 source body, app-level C05.

src/main/assistant/supervision-suggester.ts

@@ -1,5 +1,6 @@
 import { z } from 'zod'
-import type { SupervisionSuggestionStore, SuggestionCandidate, SuggestionPhrase } from './supervision-suggestions'
+import type { SuggestionCandidate, SuggestionPhrase } from './supervision-suggestions'
+import type { SuggestionDomainPort } from './supervision-domain-ports'
 
 export type SuggestionPhraser = (request: {
   systemInstruction: string
@@ -37,11 +38,11 @@ function parse(value: unknown): SuggestionPhrase[] {
  * only when candidates exist, and only sees those candidates.
  */
 export async function deriveSuggestions(
-  store: SupervisionSuggestionStore,
+  store: SuggestionDomainPort,
   phrase: SuggestionPhraser,
   input: { supervisionRunId: string; heartbeatRunId: string; stalledDays?: number; now?: string }
 ): Promise<number> {
-  const selected = store.candidates(input.supervisionRunId, { stalledDays: input.stalledDays, now: input.now })
+  const selected = await store.candidates(input.supervisionRunId, { stalledDays: input.stalledDays, now: input.now })
   if (!selected || !selected.candidates.length) return 0
   const phrases = parse(await phrase({
     systemInstruction, outputContract,