cleanup: drop dead deployment_config references + orphaned deleted_contacts template

Tidies stale references left behind by the navi extraction + decoupling work.

- lib/deployment_config.py: the consumer-catalog docstring listed four in-process
  consumers that were all extracted/removed across cleanups #4/#5/#6/#27
  (/api/landclass gate, google_places.py, place_detail.py, offroute/router.py).
  Replaced the stale 4-bullet list with an accurate note: recon has no remaining
  caller of get_deployment_config() today; the module is retained per cleanup #1.
- lib/api.py: removed the now-dead `from .deployment_config import
  get_deployment_config` import (its only caller was the /api/landclass handler
  removed in #5 — zero call sites remain).
- templates/knowledge/deleted_contacts.html: deleted — orphaned since cleanup #3
  removed the contacts/dashboard routes; zero callers in recon.

No functional change (the removed import was unused; the template unrendered).

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

templates/knowledge/deleted_contacts.html

@@ -1,56 +0,0 @@
-{% extends "base.html" %}
-{% block content %}
-<h3 style="color:#ffa500;margin-bottom:16px;">Deleted Contacts</h3>
-{% if not contacts %}
-<p class="text-dim">No deleted contacts.</p>
-{% else %}
-<table>
-    <tr><th>Label</th><th>Name</th><th>Category</th><th>Phone</th><th>Deleted At</th><th>Actions</th></tr>
-    {% for c in contacts %}
-    <tr id="row-{{ c.id }}">
-        <td>{{ c.label }}</td>
-        <td>{{ c.name or '' }}</td>
-        <td class="text-dim">{{ c.category or '' }}</td>
-        <td class="text-dim text-xs">{{ c.phone or '' }}</td>
-        <td class="text-dim text-xs">{{ c.deleted_at or '' }}</td>
-        <td>
-            <button class="btn" onclick="restoreContact({{ c.id }})">Restore</button>
-            <button class="btn" style="margin-left:4px;color:#ff4444;" onclick="purgeContact({{ c.id }})">Purge</button>
-        </td>
-    </tr>
-    {% endfor %}
-</table>
-{% endif %}
-{% endblock %}
-{% block scripts %}
-<script>
-async function restoreContact(id) {
-    try {
-        var resp = await fetch('/api/contacts/' + id + '/restore', {method: 'POST'});
-        if (resp.ok) {
-            location.reload();
-        } else {
-            var data = await resp.json();
-            alert(data.error || 'Restore failed');
-        }
-    } catch(e) {
-        alert('Error: ' + e.message);
-    }
-}
-
-async function purgeContact(id) {
-    if (!confirm('Permanently delete this contact? This cannot be undone.')) return;
-    try {
-        var resp = await fetch('/api/contacts/' + id + '/purge', {method: 'DELETE'});
-        if (resp.ok) {
-            location.reload();
-        } else {
-            var data = await resp.json();
-            alert(data.error || 'Purge failed');
-        }
-    } catch(e) {
-        alert('Error: ' + e.message);
-    }
-}
-</script>
-{% endblock %}