fix(build): build @loopover/contract in both deploy paths so a clean checkout can deploy

Cloudflare Workers Builds is the deploy path for BOTH workers — no GitHub
Actions workflow runs `wrangler deploy` (ui-deploy.yml only validates) — and
both have failed on every recent commit. Production has consequently been
serving stale code: #9574's `fleetAccuracy.basis` and #9594's anchor-payload
auth exemption both landed on main and neither is live.

One root cause, two scripts: nothing builds `@loopover/contract` before
something needs its `dist/`. `@loopover/engine` does not depend on it, so
building engine alone leaves it unemitted.

loopover-ui — `npm run ui:build` runs `turbo run build --filter=@loopover/engine`,
then `ui:openapi`, whose `scripts/write-ui-openapi.ts` reaches
`src/openapi/schemas.ts` and imports `@loopover/contract/dist/public-api.js`:

  Error [ERR_MODULE_NOT_FOUND]: Cannot find module
    '/opt/buildhome/repo/node_modules/@loopover/contract/dist/public-api.js'

loopover-api — `npm run deploy:api` builds only `@loopover/engine`, then
`wrangler deploy` bundles `src/index.ts`, which reaches `@loopover/contract`
from src/mcp/*, src/openapi/schemas.ts and src/orb/broker-client.ts:

  ✘ [ERROR] Build failed with 8 errors:
    ✘ [ERROR] Could not resolve "@loopover/contract"

Both pass in `test:ci` only by accident of ordering: `npm run typecheck` runs
first, and the `//#typecheck` turbo task already carries an explicit
`@loopover/contract#build` edge — added for exactly this failure mode, and
documented in turbo.json as "the root package.json dependency does NOT create a
build edge for a root task". Neither deploy command runs a typecheck ahead of
itself, so the incidental ordering never applies.

Adding the same edge to each deploy path's own turbo invocation, which is the
level that actually owns the dependency. `deploy:api` also moves from a bare
`npm --workspace ... run build` to turbo so both paths express it identically.

Verified against a genuinely clean tree (package dists and .tsbuildinfo files
removed, TURBO_FORCE=1 to defeat the shared worktree cache — the first two
reproduction attempts were masked by a stale tsbuildinfo and then by a turbo
cache replay). ui:build: exit 1 -> exit 0. wrangler deploy --dry-run: 8
unresolved "@loopover/contract" imports -> 0, exit 0.

Author: JSONbored

package.json

@@ -13,7 +13,7 @@
   "scripts": {
     "dev": "wrangler dev",
     "deploy": "wrangler deploy",
-    "deploy:api": "npm --workspace @loopover/engine run build && wrangler d1 migrations apply loopover --remote && wrangler deploy",
+    "deploy:api": "turbo run build --filter=@loopover/engine --filter=@loopover/contract && wrangler d1 migrations apply loopover --remote && wrangler deploy",
     "selfhost:postgres:migrate": "tsx scripts/migrate-selfhost-sqlite-to-postgres.ts",
     "selfhost:env-reference": "node --experimental-strip-types scripts/gen-selfhost-env-reference.ts",
     "selfhost:env-reference:check": "node --experimental-strip-types scripts/gen-selfhost-env-reference.ts --check",
@@ -59,7 +59,7 @@
     "lint:composite-actions": "node --experimental-strip-types scripts/lint-composite-actions.ts",
     "ui:dev": "npm run ui:preview",
     "ui:kit:build": "npm run build --workspace @loopover/ui-kit",
-    "ui:build": "npm run ui:kit:build && turbo run build --filter=@loopover/engine && npm run ui:openapi && npm --workspace @loopover/ui run build && npm --workspace @loopover/ui-miner run build",
+    "ui:build": "npm run ui:kit:build && turbo run build --filter=@loopover/engine --filter=@loopover/contract && npm run ui:openapi && npm --workspace @loopover/ui run build && npm --workspace @loopover/ui-miner run build",
     "ui:preview": "npm run ui:build && wrangler dev --config apps/loopover-ui/dist/server/wrangler.json --ip 127.0.0.1 --port 4173 --local",
     "ui:lint": "npm run ui:kit:build && npm --workspace @loopover/ui-kit run format:check && npm --workspace @loopover/ui run format:check && npm --workspace @loopover/ui run lint && npm --workspace @loopover/ui-miner run format:check && npm --workspace @loopover/ui-miner run lint",
     "ui:typecheck": "npm run ui:kit:build && npm --workspace @loopover/ui run typecheck && npm --workspace @loopover/ui-miner run typecheck",