feat: add videodb media index with Docker stack

- Add videodb PHP/MySQL media collection manager (Blu-ray, DVD, CD)
- Dockerfile: PHP 8.1 + Apache with GD/mysqli/exif extensions
- docker-compose.yml: app on port 6761 + MySQL 8.0 with health checks
- docker-entrypoint.sh: auto-generates config.inc.php from env vars,
  waits for MySQL, initializes DB schema idempotently
- init-db.php: CLI schema installer using app's own prefix_query() logic
- Persistent volumes for DB, cache, and cover images

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

videodb/templates/default/search.tpl

@@ -0,0 +1,64 @@
+{*
+  Template for the search interface
+  $Id: search.tpl,v 2.14 2005/06/04 16:21:09 andig2 Exp $
+*}
+
+<script language="JavaScript" type="text/javascript" src="javascript/search.js"></script>
+
+{include file="searchengines.tpl"}
+
+<form action="search.php" id="search" name="search">
+  <table width="100%" class="tableborder" cellpadding="4">
+    <tr>
+      <td>
+        <table width="100%" border="0" cellpadding="5" cellspacing="0">
+          <tr>
+            <td width="20%">
+                <span class="filterlink">{$lang.keywords}:</span>
+                <br/>
+                <input type="text" name="q" id="q" value="{$q_q}" size="45" maxlength="300"/>
+                <br/>
+                {include file="searchradios.tpl"}
+                <input type="button" value="{$lang.l_search}" onClick="submitSearch()" class="button" />
+            </td>
+          </tr>
+          <tr>
+            <td>
+              {$lang.keywords_desc}
+            </td>
+          </tr>
+        </table>
+      </td>
+      <td nowrap="nowrap" align="center" style="text-align:center">
+        {$lang.fieldselect}:<br />
+        <select name="fields[]" size="6" multiple="multiple">
+          {html_options options=$search_fields selected=$selected_fields}
+        </select><br />
+        <a href="javascript:selectAllFields()">{$lang.selectall}</a>
+      </td>
+      <td nowrap="nowrap">
+        {if !empty($owners)}
+          <span>{$lang.owner}:</span>
+          {html_options name=owner options=$owners selected=$video.owner_id}<br/>
+        {/if}
+        {$lang.genre_desc}:
+        {$genreselect}
+      </td>
+    {if !empty($imgurl)}
+      <td>
+{*
+          <a href='http://uk.imdb.com/Name?{$q_q|replace:"&quot;":""|escape:url}'>
+*}
+          <a href='http://uk.imdb.com/Name?{$q|replace:"&quot;|\"":""|escape:url}'>
+          <img align=left src="{$imgurl}" border="0" width="97" height="144">
+          </a>
+      </td>
+    {/if}
+    </tr>
+
+  </table>
+</form>
+
+<script language="JavaScript" type="text/javascript">
+    selectField(document.search.q);
+</script>