docs: Update documentation + changelog

Author: CuriousLearner

.readthedocs.yaml

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+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+version: 2
+
+# Set the OS, Python version, and dependencies
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+# Build documentation with Sphinx
+sphinx:
+  builder: html
+  configuration: docs/conf.py
+  fail_on_warning: false
+
+# Python configuration
+python:
+  install:
+    - requirements: docs/requirements.txt
+    - method: pip
+      path: .
+
+# Additional formats (optional - remove if you don't want PDF/EPUB)
+formats:
+  - pdf
+  - epub

CHANGELOG.md

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+Changelog
+=========
+
+All notable changes to this project will be documented in this file.
+
+The format is based on `Keep a Changelog <https://keepachangelog.com/en/1.0.0/>`_,
+and this project adheres to `Semantic Versioning <https://semver.org/spec/v2.0.0.html>`_.
+
+0.1.0b1 - 2025-01-XX
+--------------------
+
+⚠️ **Beta Release** - Feature complete, ready for testing. API may still change before 1.0.
+
+**Added**
+
+* Multiple user groups support via ``MASKED_GROUPS`` configuration
+* Environment variable configuration following 12-factor principles
+* Comprehensive documentation with examples and deployment guides
+
+**Changed**
+
+* Improved documentation structure and clarity
+* Refined compliance messaging - positions as compliance support tool
+
+**Removed**
+
+* ``database_role()`` context manager - unsafe arbitrary role switching
+* ``@database_role_required()`` decorator - potential security risk
+* Direct role manipulation utilities - use ``anonymized_data()`` instead
+
+0.1.0-alpha.1 - 2025-09-20
+--------------------------
+
+⚠️ **Alpha Release** - Initial preview release.
+
+**Core Features**
+
+* Django models: ``MaskingRule``, ``MaskingPreset``, ``MaskedRole``, ``MaskingLog``
+* Management commands: ``anon_init``, ``anon_apply``, ``anon_status``, ``anon_dump``, ``anon_validate``, ``anon_load_yaml``, ``anon_drop``, ``anon_fix_permissions``
+* Middleware (``AnonRoleMiddleware``) for automatic role switching based on user groups
+* Context managers (``anonymized_data``) for manual control
+* Decorators (``@use_anonymized_data``) for view-level anonymization
+* Class-based view mixins (``AnonymizedDataMixin``)
+* Django admin integration with bulk actions
+
+**Pre-built Presets**
+
+* Django Auth, E-commerce, Healthcare, Finance, Social Media, Education
+
+**Security**
+
+* SQL injection prevention with function validation
+* Role-based access control
+* Audit logging
+* Parameterized queries
+
+**Requirements**
+
+* Python 3.8+
+* Django 3.2+
+* PostgreSQL 12+ with Anonymizer extension