Add FL e-Filing Portal integration (assisted submission, Phase 1)

- fl.efiling.submission: generates the 11th Circuit court filename
  ({LastName}_{CaseNumber}_{DocumentType}_{YYYYMMDD}.pdf), validates PDF/A via
  pikepdf (XMP pdfaid + OutputIntents, graceful if pikepdf missing), and tracks
  status (draft → validated → pending_manual → submitted → accepted/rejected/failed)
- Assisted flow: "Open e-Filing Portal" deep-links to eportal.flcourts.org
  (?caseNumber=… when available; base overridable via ir.config_parameter
  fl_efiling.portal_url); confirmation # capture; accepted/rejected mark the
  linked fl.document filed and log to chatter
- Phase 2 API stub (action_submit_api) reads creds/endpoint from ir.config_parameter
  and refuses to call an unconfirmed endpoint — no guessed URLs, no silent failure
- fl.efiling.wizard: pick document/attachment/filing_type, preview the filename,
  create + auto-validate the submission
- Wiring: model + wizard registered, ACL (admin/paralegal), e-filing views, Cases
  menu item, fl.case.efiling_submission_ids + Filings tab + Prepare e-Filing button

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

activeblue_familylaw/models/fl_case.py

@@ -400,6 +400,9 @@ class FlCase(models.Model):
     document_ids = fields.One2many(
         'fl.document', 'case_id', string='Case Documents'
     )
+    efiling_submission_ids = fields.One2many(
+        'fl.efiling.submission', 'case_id', string='e-Filing Submissions'
+    )
 
     # ══════════════════════════════════════════════════════════════════════
     # PROJECT / TASK INTEGRATION
@@ -1222,3 +1225,14 @@ class FlCase(models.Model):
             'view_mode': 'form',
             'target': 'current',
         }
+
+    def action_prepare_efiling(self):
+        self.ensure_one()
+        return {
+            'type': 'ir.actions.act_window',
+            'name': 'Prepare e-Filing',
+            'res_model': 'fl.efiling.wizard',
+            'view_mode': 'form',
+            'target': 'new',
+            'context': {'default_case_id': self.id},
+        }