feat: initial backend codebase — EnCoach v3

Complete Odoo 19 backend with 25 custom addons:
- encoach_core: user/entity/role management
- encoach_api: REST API + JWT auth
- encoach_ai: OpenAI integration, AI settings, generation
- encoach_ai_course: AI-powered English & IELTS course generation
- encoach_exam_template/session: exam creation, structures, sessions
- encoach_scoring: AI auto-grading + manual approval
- encoach_vector: pgvector RAG integration
- encoach_adaptive: adaptive learning engine
- encoach_placement: placement testing
- encoach_taxonomy/resources: content taxonomy & resource management
- Plus 14 more modules for courses, branding, portal, etc.

Includes docs: user guide, generation report, developer workflow.

Made-with: Cursor

custom_addons/encoach_quality_gate/models/__init__.py

@@ -0,0 +1 @@
+from . import ielts_standards_check

custom_addons/encoach_quality_gate/models/ielts_standards_check.py

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+from odoo import models, fields
+
+
+class EncoachIeltsStandardsCheck(models.Model):
+    _name = 'encoach.ielts.standards.check'
+    _description = 'IELTS Standards Check'
+
+    content_id = fields.Integer(required=True)
+    content_type = fields.Selection([
+        ('passage', 'Passage'),
+        ('audio', 'Audio'),
+        ('writing_prompt', 'Writing Prompt'),
+        ('speaking_card', 'Speaking Card'),
+    ], required=True)
+    check_type = fields.Selection([
+        ('format_compliance', 'Format Compliance'),
+        ('band_calibration', 'Band Calibration'),
+        ('answer_key_completeness', 'Answer Key Completeness'),
+    ], required=True)
+    passed = fields.Boolean(default=False)
+    error_detail = fields.Text()
+    checked_at = fields.Datetime(default=fields.Datetime.now)