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/wizard/repair_visit_report_wizard.py

@@ -20,6 +20,8 @@ On confirm:
 
 import logging
 
+from markupsafe import Markup
+
 from odoo import _, api, fields, models
 from odoo.exceptions import UserError
 
@@ -162,8 +164,9 @@ class RepairVisitReportWizard(models.TransientModel):
                 'x_fc_maintenance_contract_id': False,
             })
             repair.message_post(
-                body=_('Spawned follow-up repair <b>%(name)s</b> for "found another issue".',
-                       name=stub.name),
+                body=Markup(_(
+                    'Spawned follow-up repair <b>%(name)s</b> for "found another issue".'
+                )) % {'name': stub.name or ''},
             )
 
         # If a stub was spawned, open it directly so the tech can fill in details.