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/InstitutionalKnowledge/Index.hs

@@ -1,6 +1,6 @@
 module Web.View.InstitutionalKnowledge.Index where
 
-import Web.View.Prelude
+import IHP.ViewPrelude
 
 data IndexView = IndexView
     { entries  :: ![InstitutionalKnowledgeEntry]
@@ -27,7 +27,7 @@ instance View IndexView where
                     <label class="block text-sm font-medium text-gray-700 mb-1">Hub</label>
                     <select name="hubId" class="border border-gray-300 rounded-md px-3 py-2 text-sm">
                         <option value="">All hubs</option>
-                        {forM_ hubs \h -> [hsx|<option value={show h.id}>{h.name}</option>|]}
+                        {forEach hubs renderHubOption}
                     </select>
                 </div>
                 <button type="submit"
@@ -36,23 +36,28 @@ instance View IndexView where
                 </button>
             </form>
 
-            {if null entries
-                then [hsx|<p class="text-gray-500 text-sm">No entries found.</p>|]
-                else [hsx|
-                    <div class="space-y-4">
-                        {forM_ entries renderEntry}
-                    </div>
-                |]}
+            {renderEntriesSection entries}
         </div>
     |]
-      where
-        renderEntry e = [hsx|
-            <div class="bg-white shadow rounded-lg p-5">
-                <div class="flex justify-between items-start">
-                    <p class="text-sm text-gray-800 leading-relaxed flex-1 mr-4">{e.summary}</p>
-                    <a href={ShowInstitutionalKnowledgeAction { knowledgeEntryId = e.id }}
-                       class="text-sm text-blue-600 hover:underline whitespace-nowrap">View</a>
-                </div>
-                <p class="text-xs text-gray-400 mt-2">{show e.createdAt}</p>
-            </div>
-        |]
+renderHubOption :: Hub -> Html
+renderHubOption h = [hsx|<option value={show h.id}>{h.name}</option>|]
+
+renderEntriesSection :: [InstitutionalKnowledgeEntry] -> Html
+renderEntriesSection [] = [hsx|<p class="text-gray-500 text-sm">No entries found.</p>|]
+renderEntriesSection entries = [hsx|
+    <div class="space-y-4">
+        {forEach entries renderEntry}
+    </div>
+|]
+
+renderEntry :: InstitutionalKnowledgeEntry -> Html
+renderEntry e = [hsx|
+    <div class="bg-white shadow rounded-lg p-5">
+        <div class="flex justify-between items-start">
+            <p class="text-sm text-gray-800 leading-relaxed flex-1 mr-4">{e.summary}</p>
+            <a href={ShowInstitutionalKnowledgeAction (e.id)}
+               class="text-sm text-blue-600 hover:underline whitespace-nowrap">View</a>
+        </div>
+        <p class="text-xs text-gray-400 mt-2">{show e.createdAt}</p>
+    </div>
+|]