fix(WP-0014): pre-flight compilation fixes, Tailwind pipeline, and admin seed

A2 — Compilation fixes:
- Remove inline FK constraints from Schema.sql; IHP schema compiler cannot
  parse them. Add 1744329600-restore-fk-constraints.sql migration to restore
  referential integrity at the DB level.
- Rename `#label` → `#label_` throughout to avoid clash with Haskell built-in.
- Fix `hub.id == hid` UUID comparisons to use `toUUID hub.id`.
- Replace non-existent `setStatus`/`respondJson` calls with
  `renderJsonWithStatusCode` throughout Api controllers.
- Fix qualified package import for `cryptohash-sha256` in Auth.hs.
- Add `CanSelect (Text, Text)` instance in Helper.View.
- Refactor HSX inline lambdas to named helper functions in 100+ views
  (GHC cannot infer types for anonymous functions inside quasi-quoted HSX).
- Fix missing imports (IHP.QueryBuilder, IHP.Fetch, Web.Routes, Only, etc.)
  across helpers and controllers.
- Remove duplicate `diffUTCTime` definition in BottleneckDetector.
- Change `createEventForHub` return type from `IO ResponseReceived` to `IO ()`.
- Seed type-registry vocabulary via 1744502400-seed-type-registries.sql
  (moved from Schema.sql where IHP does not execute INSERT statements).

A3 — Tailwind build pipeline:
- Add `tailwindcss` to flake.nix native packages.
- Uncomment `tailwind.exec` process in devenv shell config.
- Add tailwind/tailwind.config.js (scans Web/View/**/*.hs).
- Add tailwind/app.css with @tailwind directives.

A4 — Admin user seed:
- Add 1744416000-seed-admin-user.sql: inserts admin@inter-hub.local
  with bcrypt-hashed password admin1234! (cost 10).
- Add .env.example documenting all required environment variables
  and default admin credentials.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/View/Hubs/BottleneckDashboard.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 import Data.Time.Clock (diffUTCTime, getCurrentTime)
 
 data BottleneckDashboardView = BottleneckDashboardView
@@ -20,11 +21,11 @@ instance View BottleneckDashboardView where
                 <p class="text-sm text-gray-500">{hub.name}</p>
             </div>
             <div class="flex gap-2">
-                <a href={DetectBottlenecksAction { hubId = hub.id }}
+                <a href={DetectBottlenecksAction (hub.id)}
                    class="text-sm bg-indigo-600 text-white px-3 py-1.5 rounded hover:bg-indigo-700">
                     Detect
                 </a>
-                <a href={ShowHubAction { hubId = hub.id }}
+                <a href={ShowHubAction (hub.id)}
                    class="text-sm border border-gray-300 px-3 py-1.5 rounded hover:bg-gray-50">
                     ← Hub
                 </a>
@@ -33,9 +34,7 @@ instance View BottleneckDashboardView where
 
         {forEach stages renderStageSection}
 
-        {if null bottlenecks
-            then [hsx|<p class="text-sm text-gray-400 mt-4">No active bottlenecks detected.</p>|]
-            else mempty}
+        {if null bottlenecks then noBottlenecksMsg else mempty}
     |]
       where
         stages = ["candidate", "requirement", "decision", "observation"] :: [Text]
@@ -83,12 +82,15 @@ instance View BottleneckDashboardView where
                     </span>
                 </td>
                 <td class="px-3 py-2 text-right">
-                    <a href={ResolveBottleneckAction { bottleneckRecordId = b.id }}
+                    <a href={ResolveBottleneckAction (b.id)}
                        class="text-xs text-indigo-600 hover:underline">Resolve</a>
                 </td>
             </tr>
             |]
 
+noBottlenecksMsg :: Html
+noBottlenecksMsg = [hsx|<p class="text-sm text-gray-400 mt-4">No active bottlenecks detected.</p>|]
+
 severityBadge :: Text -> Text
 severityBadge s = case s of
     "critical" -> "bg-red-100 text-red-800"