Add print view, board info card and document logo upload

- Seitenansicht (/projects/:projectId/print): tabular cover page, board
  overview with supply structure and power sums, one plan per board with a
  repeating title block; PDF via the browser print dialog with named @page
  rules (A4 portrait cover, A4/A3 landscape plans, page x of y).
- Distribution-board info card (board number, location, fed-from, remark)
  in the board edit dialog, persisted through the additively extended
  distribution-board.update command (migration 0008, snapshot schema 6,
  legacy subtree commands normalized).
- Global document logo upload (PNG/JPEG/SVG, max 2 MB) outside project
  revisions and snapshots.
- fed-from stays free text; the overview hierarchy and cumulated sums are
  preliminary until the feed link is modeled.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/db/repositories/project-snapshot.repository.ts

@@ -5,6 +5,7 @@ import { ProjectSnapshotNameConflictError } from "../../domain/errors/project-sn
 import { createProjectStateRestoreCommand } from "../../domain/models/project-state-restore-command.model.js";
 import {
   deserializeProjectStateSnapshot,
+  isSupportedProjectStateSnapshotSchemaVersion,
   projectStateSnapshotSchemaVersion,
 } from "../../domain/models/project-state-snapshot.model.js";
 import type {
@@ -138,7 +139,7 @@ export class ProjectSnapshotRepository implements ProjectSnapshotStore {
     if (actualChecksum !== stored.payloadSha256) {
       throw new Error("Project snapshot checksum verification failed.");
     }
-    if (stored.schemaVersion !== projectStateSnapshotSchemaVersion) {
+    if (!isSupportedProjectStateSnapshotSchemaVersion(stored.schemaVersion)) {
       throw new Error("Project snapshot schema version is not supported.");
     }
     const targetState = deserializeProjectStateSnapshot(stored.payloadJson);