fix(notifications): Send dialog cancel no longer pre-sends + no duplicate PDF

Two user-reported bugs on S00056 (and visible on any SO/invoice):

Bug 1: Cancelling the Send dialog still sends the email.
  action_quotation_send is a button handler that returns a
  compose-dialog action synchronously. Our override was calling
  _dispatch('quote_sent', ...) AFTER super(), which immediately
  sends the email via template.send_mail() before the user ever
  sees the dialog. Clicking Cancel at that point only dismisses
  the already-sent email's compose window.

  Fix: removed the _dispatch call entirely from action_quotation_send.
  The Send button IS the manual-send path; Odoo's compose dialog
  (pre-populated with our FP: Quotation Sent template thanks to
  _find_mail_template) handles the send-or-cancel choice correctly.

  If an auto-quote-sent notification is ever wanted, it should be
  wired from a cron that scans SOs that just transitioned
  draft -> sent, not from the button handler. Noted in a code
  comment.

Bug 2: Two copies of the same PDF attached to every email.
  The mail.template records now carry report_template_ids (set by
  the post_init hook from the previous refactor) which Odoo uses to
  auto-attach PDFs on send_mail(). But the fp.notification.template
  records ALSO had attach_quotation / attach_sale_order / attach_invoice
  flags set, which cause _collect_attachments() to render the same
  PDF a second time and pass it in email_values.

  Fix: turned those three flags off in the XML data file. Other
  flags (attach_coc, attach_bol, attach_receipt, attach_thickness_report,
  attach_packing_list, attach_pod) stay on — those are genuinely
  different documents, not dupes.

  Because the records are noupdate="1", updated the post_init_hook
  to also backfill the flag changes onto existing DB rows so
  production instances get cleaned up on -u, not just fresh installs.

Smoke:
  attach_quotation=False attach_sale_order=False attach_invoice=False on all three records
  1 report per template (no dupes)
  action_quotation_send no longer contains _dispatch("quote_sent", ...)

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

fusion_plating/fusion_plating_notifications/data/fp_notification_template_data.xml

@@ -1,12 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <odoo noupdate="1">
 
+    <!-- attach_quotation / attach_sale_order / attach_invoice flags are
+         intentionally left off below. The PDF attachment is handled by
+         the mail.template's own `report_template_ids` (configured in
+         mail_template_data.xml); enabling the flags here would add a
+         SECOND copy of the same PDF to every email. -->
+
     <record id="fp_notif_quote_sent" model="fp.notification.template">
         <field name="name">Quotation Sent</field>
         <field name="trigger_event">quote_sent</field>
         <field name="mail_template_id" ref="fp_mail_template_quote_sent"/>
         <field name="active" eval="True"/>
-        <field name="attach_quotation" eval="True"/>
     </record>
 
     <record id="fp_notif_so_confirmed" model="fp.notification.template">
@@ -14,7 +19,6 @@
         <field name="trigger_event">so_confirmed</field>
         <field name="mail_template_id" ref="fp_mail_template_so_confirmed"/>
         <field name="active" eval="True"/>
-        <field name="attach_sale_order" eval="True"/>
     </record>
 
     <record id="fp_notif_parts_received" model="fp.notification.template">
@@ -45,7 +49,6 @@
         <field name="trigger_event">invoice_posted</field>
         <field name="mail_template_id" ref="fp_mail_template_invoice_posted"/>
         <field name="active" eval="True"/>
-        <field name="attach_invoice" eval="True"/>
     </record>
 
     <record id="fp_notif_payment_received" model="fp.notification.template">