Phase 1: core models, security, seed data, and backend views

Implements full Phase 1 of the activeblue_familylaw Odoo 18 module:
- 17 Python models (fl.case, fl.party, fl.child, fl.support.calculation,
  fl.fee.waiver, fl.income.withholding, fl.deadline, fl.hearing,
  fl.deposition, fl.discovery, fl.document, fl.caselaw, fl.analysis,
  fl.ai.engine, fl.argument, fl.statute, fl.issue.tag) + hr.expense extension
- 3 wizard stubs (intake, analysis, generate-packet)
- Security: 4 groups (admin/paralegal/portal-petitioner/portal-respondent)
  + record rules scoping portal users to their own cases
- Seed data: issue tags, FL statutes, FL DCF support schedule, ir.sequence
- 13 backend view XML files with FL 61.30 worksheet, fee waiver
  eligibility banner, DV safety resources, emancipation alerts
- Static CSS/JS stubs for Phase 6 portal

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

activeblue_familylaw/data/ir_sequence.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <data noupdate="1">
+        <record id="seq_fl_case" model="ir.sequence">
+            <field name="name">Family Law Case Reference</field>
+            <field name="code">fl.case</field>
+            <field name="prefix">FL-%(year)s-</field>
+            <field name="padding">5</field>
+            <field name="company_id" eval="False"/>
+        </record>
+    </data>
+</odoo>