Setup repo: migrate architecture specs, code stubs, and tasks from alkhub_ts

Copy architecture docs, ADRs, storage domain specs, research, reviews,
and 56 storage architecture tasks from the alkhub_ts monorepo. Adapt for
standalone @alkdev/hub repo structure (src/ not packages/hub/).

Sanitize all sensitive information:
- Replace private IPs (10.0.0.1) with localhost defaults
- Remove internal server hostnames (dev1, ns528096)
- Replace /workspace/ private paths with npm package references
- Remove hardcoded credentials from examples
- Rewrite infrastructure.md without private network details

Add Deno project scaffolding: deno.json (pinned deps), .gitignore,
AGENTS.md, entry point. Migrate existing code stubs (crypto, config
types, logger) with updated import paths.

docs/architecture/storage/projects.md

@@ -0,0 +1,41 @@
+---
+status: draft
+last_updated: 2026-04-19
+---
+
+# Table Schemas: Projects & Workspaces
+
+Project and workspace tables. For cross-cutting reference (cascade behavior, index reference, status enums, relations), see [table-reference.md](./table-reference.md). For design decisions, see [../../../decisions/](../../../decisions/).
+
+### `projects`
+
+Git repositories / work contexts. A project may have multiple workspaces (branches). Projects belong to organizations.
+
+| Column | Type | Notes |
+|--------|------|-------|
+| commonCols | — | id, metadata, createdAt, updatedAt |
+| orgId | text | FK → organizations.id (nullable — personal projects have no org) |
+| name | text NOT NULL | Project name |
+| directory | text | Local filesystem path (primary workspace) |
+| repoUrl | text | Git remote URL |
+| vcs | text | Version control system (default: `git`) |
+| iconUrl | text | Project icon URL |
+| iconColor | text | Project icon color (opencode compat) |
+
+**Indexes**: `idx_projects_org_id` on `(orgId)` — find projects for an org.
+
+### `workspaces`
+
+Project workspaces — branches, directories, and execution contexts. A project can have multiple workspaces (e.g., main branch workspace, feature branch workspace). This maps to opencode's `workspace` concept and our coordination `mappings`.
+
+| Column | Type | Notes |
+|--------|------|-------|
+| commonCols | — | id, metadata, createdAt, updatedAt |
+| projectId | text NOT NULL | FK → projects.id (cascade) |
+| type | text NOT NULL | Workspace type: `local`, `remote`, `container` |
+| branch | text | Git branch name |
+| name | text | Human-readable workspace name |
+| directory | text | Local filesystem path |
+| extra | jsonb | Workspace-specific configuration |
+
+**Indexes**: `idx_workspaces_project_id` on `(projectId)` — find workspaces for a project.