fix(fusion_repairs): chatter posts render HTML correctly via Markup

Reports of literal '<b>Client Self-Service</b>' showing in the chatter
instead of bold formatting. Cause: message_post(body=str) HTML-escapes
the string. The Odoo idiom for HTML chatter bodies is markupsafe.Markup,
with the % operator auto-escaping substitution values for XSS safety.

Fixed every message_post call:

  models/intake_service.py
    - 'Service call submitted via <b>...</b>' (the reported one)
    - 'This repair MAY be covered by our active warranty <b>...</b>'

  models/maintenance_contract.py
    - 'Sent N-day maintenance reminder to <email>'
    - 'Maintenance visit <b>...</b> booked from reminder link'

  models/technician_task.py
    - 'Rolled forward after maintenance task <b>...</b> completed'

  wizard/repair_visit_report_wizard.py
    - 'Spawned follow-up repair <b>...</b> for "found another issue"'

Pattern used: Markup(_('... <b>%(x)s</b> ...')) % {'x': escaped_value}.

Verified on local westin-v19 (BR-WA/RO/00026): DB row now reads
'<p>Service call submitted via <b>Client Self-Service</b> by Gurpreet
Singh. Session reference: RIS000015.</p>' which renders correctly in
the chatter UI.

Bumped to 19.0.1.0.3.

Co-authored-by: Cursor <cursoragent@cursor.com>

fusion_repairs/models/maintenance_contract.py

@@ -15,6 +15,7 @@ import secrets
 from datetime import timedelta
 
 from dateutil.relativedelta import relativedelta
+from markupsafe import Markup
 
 from odoo import _, api, fields, models
 
@@ -149,9 +150,12 @@ class FusionRepairMaintenanceContract(models.Model):
                     tpl.send_mail(c.id, force_send=False)
                     c.last_reminder_band = band_label
                     c.message_post(
-                        body=_('Sent %(band)s-day maintenance reminder to %(email)s.',
-                               band=band_label,
-                               email=c.partner_id.email),
+                        body=Markup(_(
+                            'Sent %(band)s-day maintenance reminder to %(email)s.'
+                        )) % {
+                            'band': band_label,
+                            'email': c.partner_id.email or '',
+                        },
                     )
                 except Exception:
                     continue
@@ -181,8 +185,9 @@ class FusionRepairMaintenanceContract(models.Model):
         })
         self.booking_repair_id = repair
         self.message_post(
-            body=_('Maintenance visit <b>%(ref)s</b> booked from reminder link.',
-                   ref=repair.name),
+            body=Markup(_(
+                'Maintenance visit <b>%(ref)s</b> booked from reminder link.'
+            )) % {'ref': repair.name or ''},
         )
         return repair