fix: resume distributed task ID counter past existing IDs; extract plugin view types

The dashboard task-create route now uses the distributed task ID allocator
(FN-3450). On projects whose tasks had been allocated through the legacy
config.nextId counter, the allocator's `ensureStateRow` was seeding a fresh
prefix at sequence 1, so new tasks restarted at FN-001 even when FN-3700
already existed. ensureStateRow now seeds past:

- the legacy config.nextId counter (when configured taskPrefix matches), and
- one past the highest numeric suffix on any existing tasks/archivedTasks row
  for the prefix.

A regression test seeds FN-3700 in a fresh DB and asserts the next reservation
returns FN-3701, not FN-001.

Plugin dashboard view contracts are now exposed via a slim type-only module
(`@fusion/dashboard/app/plugins/types`). External plugin tsc builds previously
imported `pluginViewRegistry`, transitively pulling in dashboard runtime
sources (React components, CSS, lucide-react). The dependency-graph plugin's
import + path mapping is updated to use the new module.

Schema housekeeping: drop unused scaffolding tables left over from an earlier
migration via a new idempotent migration (v67). Fresh DBs see no change;
existing DBs that ran the older migration get the orphan tables dropped on
next init.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/storage.md

@@ -195,10 +195,6 @@ Additional backend notes:
 | `project_insight_run_events` | Append-only per-run lifecycle trail (`seq`, `type`, `message`, optional `status`/`classification`/`metadata`) used by cancel/retry/timeout auditing and API inspection. |
 | `todo_lists` | Project-scoped todo list metadata (`projectId`, title, created/updated timestamps). |
 | `todo_items` | Todo list items (`listId` FK) with completion state, completion timestamp, and deterministic `sortOrder`. |
-| `project_auth_users` | Project-scoped user identities (email/display name/active state) used for membership and session relationships. |
-| `project_auth_memberships` | Project-scoped membership records linking users to fixed v1 roles (`owner`, `admin`, `editor`, `viewer`). |
-| `project_auth_providers` | Per-project external auth-provider links for users (provider + external user ID + metadata). |
-| `project_auth_sessions` | Project-scoped auth sessions tied to a user + membership with expiry and revocation timestamps. |
 | `ai_sessions` *(migration-created)* | Persisted AI interactive sessions (planning/interview/subtask) with status and conversation history. |
 | `messages` *(migration-created)* | Inter-agent/user message mailbox storage. |
 | `agentRatings` *(migration-created)* | Agent performance ratings (1-5), optional reviewer metadata, and run/task attribution. |
@@ -217,8 +213,6 @@ Additional backend notes:
 | `eval_task_results` | Per-task eval outcomes linked to runs (`runId` FK cascade), including durable task snapshots and structured score payloads. `categoryScores[]` stores canonical per-category fields (`category`, `deterministicScore`, `aiScore`, `finalScore`, `weight`, `band`, `rationale`, `evidence[]`), plus `overallScore` derived from category finals. Also stores deterministic/AI signal payloads, summary rationale, structured follow-up suggestions (`suggestionId`, `dedupeKey`, recommendation, lifecycle state, suppression fields, optional `createdTaskId` linkage), and a bounded `TaskEvaluationEvidenceBundle` (fixed source-order groups, capped entry counts, max 500-char excerpts with truncation marker) embedded in result metadata for backward-compatible persistence. |
 | `eval_run_events` | Append-only eval run event trail (`runId` FK cascade, ordered by `seq`) for orchestration/debug auditing and downstream API/UI drill-down. |
 
-Scope boundary note: the `project_auth_*` tables are strictly project-database membership/auth domain data. They do **not** replace or migrate global remote-access credentials/tokens, daemon auth, or model-provider credential settings (which remain in their existing global/project settings stores).
-
 ---
 
 ## 5) Issues Found