Architect storage around SQLite+Honker: remove PG, add multi-tenant identity, scoping

Reorient @alkdev/storage around a single SQLite database host with Honker
for pub/sub, event streams, and task queues. PostgreSQL is removed as a
target (ADR-038), eliminating dual schema maintenance and infrastructure
complexity. Honker provides DB + pubsub + queues in one .db file (ADR-039).

Add system/tenant DB model (ADR-040): identity tables in system.db, all
graph data in tenant-{orgId}.db files. Identity tables move from the hub
into storage (ADR-041). Scoping columns (ownerId, projectId) added to
graphs table (ADR-042). Graph types get scope (system/tenant/user) to
protect infrastructure schemas (ADR-043).

Define Drizzle-Honker session adapter (ADR-044): ~100-line adapter enabling
Drizzle typed queries and Honker pubsub/queue on a single connection with
transactional consistency.

Resolve OQ-03, OQ-04, OQ-19, OQ-21, OQ-22, OQ-23, OQ-24. Add new
open questions OQ-26 through OQ-29 for Honker integration specifics.

New docs: honker-integration.md (adapter, event patterns, migration).
Scrub all PG/jsonb/libsql references from existing spec docs.

docs/architecture/forward-look.md

@@ -1,6 +1,6 @@
 ---
-status: reviewed
-last_updated: 2026-05-30
+status: draft
+last_updated: 2026-05-31
 ---
 
 # Forward Look: Pointers, dbtype, and Universal IR
@@ -162,12 +162,15 @@ integration is deferred because:
 - dbtype is Phase 0 (architecture complete, no implementation)
 - The manual defs work and are well-understood
 - The Module pattern for graph types can be adopted independently (no dbtype
-  dependency)
+dependency)
+- With PostgreSQL removed (ADR-038), the original pressure for dbtype —
+  eliminating dual SQLite/PG table maintenance — is significantly reduced.
+  There is now only one set of table definitions to maintain.
 
 When dbtype reaches Phase 1 (implementation), storage can migrate from
-Drizzle table definitions to dbtype elements one table at a time. The
-Module-based graph type definitions are already compatible — they're both
-TypeBox `Type.Module` objects.
+Drizzle table definitions to dbtype elements one table at a time. The Module-based
+graph type definitions are already compatible — they're both TypeBox `Type.Module`
+objects.
 
 ## ujsx as Universal IR