refactor(opencode): extract managed-runtime helper, prune adapter dead code

- Extract makeManagedRuntime() to src/effect/managed-runtime.ts so AppRuntime
  and BootstrapRuntime stop duplicating the lazy ManagedRuntime + dispose
  pattern, and document the shared-memoMap dispose ordering invariant.
- Add lazy.resetIf(expected) and use it in 3 compare-and-reset call sites
  (db.close, AppRuntime.dispose, disposeWebHandler).
- Drop dead `filename` option from EffectDrizzleSqlite MakeConfig.
- Drop redundant `patched` IIFE flag (patchClass is already idempotent).
- Add module-load assertion that Effect's protocol keys are present so a
  silent breakage on an Effect upgrade becomes a loud failure at import.
- Collapse share-next test `live()` into the wider `wired()` factory.
- Document lifecycle constraint in db-effect.ts and test/fixture/db.ts.