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/technician_task.py

@@ -2,6 +2,8 @@
 # Copyright 2024-2026 Nexa Systems Inc.
 # License OPL-1 (Odoo Proprietary License v1.0)
 
+from markupsafe import Markup
+
 from odoo import fields, models
 
 
@@ -47,11 +49,10 @@ class FusionTechnicianTaskRepairs(models.Model):
                 try:
                     contract.last_service_date = fields.Date.context_today(task)
                     contract.roll_next_due_date()
-                    contract.message_post(body=(
+                    contract.message_post(body=Markup(
                         'Rolled forward after maintenance task '
-                        f'<b>{task.name}</b> completed. '
-                        f'Next due {contract.next_due_date}.'
-                    ))
+                        '<b>%s</b> completed. Next due %s.'
+                    ) % (task.name or '', str(contract.next_due_date or '')))
                 except Exception:
                     # Never let a contract roll failure block the task write.
                     pass