ci(forgejo): fix artifact fork URL, DinD docker access, db test timeout

- forgejo/upload-artifact -> full code.forgejo.org URL (not on github.com,
  where DEFAULT_ACTIONS_URL sent it).
- e2e + journal-image-smoke: set DOCKER_HOST=tcp://docker-in-docker:2375 so
  the job's docker CLI reaches the DinD daemon (no /var/run/docker.sock).
  (Runner config also now attaches jobs to the runner network.)
- @trails-cool/db test: --testTimeout=20000; the cold drizzle/postgres import
  exceeds vitest's 5s default under runner CPU contention.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/db/package.json

@@ -10,7 +10,7 @@
   "main": "./src/index.ts",
   "types": "./src/index.ts",
   "scripts": {
-    "test": "vitest run",
+    "test": "vitest run --testTimeout=20000",
     "lint": "eslint .",
     "typecheck": "tsc"
   },