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/AdaptiveThresholds/Index.hs

@@ -1,6 +1,6 @@
 module Web.View.AdaptiveThresholds.Index where
 
-import Web.View.Prelude
+import IHP.ViewPrelude
 import Data.Time (diffUTCTime)
 
 data IndexView = IndexView
@@ -34,16 +34,9 @@ instance View IndexView where
                 <div class="flex justify-between items-start">
                     <div>
                         <h3 class="font-semibold text-gray-900">{h.name}</h3>
-                        {case mCfg of
-                            Nothing -> [hsx|<p class="text-sm text-gray-400 mt-1">Not calibrated</p>|]
-                            Just cfg -> [hsx|
-                                <p class="text-sm text-gray-600 mt-1">
-                                    Last calibrated: {show cfg.calibrationDate}
-                                </p>
-                                <p class="text-sm text-gray-500">{maybe "" id cfg.notes}</p>
-                            |]}
+                        {renderCfgStatus mCfg}
                     </div>
-                    <form method="POST" action={CalibrateThresholdsAction { hubIdForThreshold = h.id }}>
+                    <form method="POST" action={CalibrateThresholdsAction (h.id)}>
                         {csrfTokenTag}
                         <button type="submit"
                             class="px-3 py-1.5 text-sm bg-indigo-600 text-white rounded hover:bg-indigo-700">
@@ -60,3 +53,12 @@ instance View IndexView where
                 <p class="text-xs text-gray-400 mt-1">{show i.computedAt}</p>
             </div>
         |]
+
+renderCfgStatus :: Maybe AdaptiveThresholdConfig -> Html
+renderCfgStatus Nothing = [hsx|<p class="text-sm text-gray-400 mt-1">Not calibrated</p>|]
+renderCfgStatus (Just cfg) = [hsx|
+    <p class="text-sm text-gray-600 mt-1">
+        Last calibrated: {show cfg.calibrationDate}
+    </p>
+    <p class="text-sm text-gray-500">{maybe "" id cfg.notes}</p>
+|]