perf: replace fat-view student index query with lean getPublishedAuthors()

The répertoire page was loading the full v_theses_public view
(15 JOINs + 8 GROUP_CONCAT temp B-trees) via getAllPublishedTheses()
just to build the student name → thesis-id map on the index page.
Only two columns (id, authors) were ever consumed by the template.

Add Database::getPublishedAuthors(): array
- Queries thesis_authors JOIN authors directly on the theses base table
- Filters on theses.is_published = 1 using the existing index
- Returns only id + GROUP_CONCAT(authors) — no view expansion
- Results verified identical to the old getAllPublishedTheses() output

Update search.php to call getPublishedAuthors() instead.
Mark getAllPublishedTheses() @deprecated in Database.php.

All tests pass.

TODO.md

@@ -363,12 +363,11 @@ Goal: rename the tables and column to the canonical M2M pattern (`tags`, `thesis
       with a plain table query in `searchTheses` and `getPublishedTheses`** — build the minimal JOIN set 
       per query and let indexes filter `theses` first. Keep the views for reporting/admin use only.
 
-- [ ] **`getAllPublishedTheses()` in `search.php`** — fetches every published thesis (all columns,
+- [x] **`getAllPublishedTheses()` in `search.php`** — fetches every published thesis (all columns,
       all JOINs) just to build the student-name index on the Répertoire page. This is a full table
-      scan through the fat view. Replace with a dedicated lean query:
-      `SELECT id, authors FROM v_theses_public ORDER BY authors ASC` — or add
-      `Database::getPublishedAuthors(): array` that queries `thesis_authors JOIN authors` directly,
-      avoiding the view entirely.
+      scan through the fat view. Replaced with `Database::getPublishedAuthors(): array` that queries
+      `thesis_authors JOIN authors` directly (only `id` + `authors` columns), avoiding the view entirely.
+      `getAllPublishedTheses()` kept but marked `@deprecated`.
 
 - [x] **`migration 005` view is stale in the file** — `005_add_banner.sql` recreates the view still
       referencing `thesis_keywords` / `keywords.keyword` (the old pre-migration-001 names).

public/search.php

@@ -46,8 +46,8 @@ try {
     $orientations = $db->getAllOrientations();
     $apPrograms   = $db->getAllAPPrograms();
     $keywords     = $db->getUsedTags();
-    // Fetch all published theses for the student index (no artificial cap)
-    $students = $db->getAllPublishedTheses();
+    // Fetch id+authors only — lean query bypassing the fat v_theses_public view
+    $students = $db->getPublishedAuthors();
 } catch (InvalidArgumentException $e) {
     $validationError = $e->getMessage();
     $results = []; $totalItems = 0; $totalPages = 0;

src/Database.php

@@ -408,6 +408,10 @@ class Database {
     /**
      * Return ALL published theses (no cap) — for internal use (student index).
      * Not exposed to user-controlled input.
+     *
+     * @deprecated Use getPublishedAuthors() for the répertoire student index —
+     *             it avoids the expensive v_theses_public view and only fetches
+     *             the two columns actually needed (id, authors).
      */
     public function getAllPublishedTheses(): array {
         $stmt = $this->pdo->query(
@@ -416,6 +420,29 @@ class Database {
         return $stmt->fetchAll();
     }
 
+    /**
+     * Lean query for the répertoire student-name index.
+     *
+     * Avoids the fat v_theses_public view (15 JOINs + 8 GROUP_CONCAT B-trees).
+     * Queries thesis_authors → authors directly, letting the index on
+     * theses(is_published) filter the base table before any JOIN.
+     *
+     * Returns rows of [id => int, authors => "Name1,Name2"].
+     */
+    public function getPublishedAuthors(): array {
+        $stmt = $this->pdo->query(
+            "SELECT t.id,
+                    GROUP_CONCAT(a.name ORDER BY ta.author_order ASC) AS authors
+             FROM theses t
+             JOIN thesis_authors ta ON ta.thesis_id = t.id
+             JOIN authors a         ON a.id          = ta.author_id
+             WHERE t.is_published = 1
+             GROUP BY t.id
+             ORDER BY MIN(a.name) ASC"
+        );
+        return $stmt->fetchAll();
+    }
+
     public function getAvailableYears() {
         $sql = "SELECT DISTINCT year FROM theses WHERE is_published = 1 ORDER BY year DESC";
         $stmt = $this->pdo->query($sql);

src/cache/rate_limit/ad921d60486366258809553a3db49a4a.json

@@ -1 +1 @@
-[1774694544]
+[1774701325]