Add PyPI publication files and build package

- Add LICENSE (MIT)
- Add CHANGELOG.md with v0.1.0 release notes
- Add MANIFEST.in for proper package building
- Build successful: rentcache-0.1.0-py3-none-any.whl
- Package installs correctly with all dependencies
- Ready for PyPI publication

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).
+
+## [0.1.0] - 2025-01-09
+
+### Added
+- Initial release of RentCache
+- FastAPI proxy server for Rentcast API with comprehensive endpoint coverage
+- Intelligent caching system with soft delete and stale-while-revalidate
+- Multi-backend cache support (SQLite, Redis, Memory)
+- Rate limiting per API key and endpoint with exponential backoff
+- Cost management with usage tracking and estimation
+- Rich CLI for administration and monitoring
+- SQLAlchemy models for cache, API keys, rate limiting, and usage stats
+- Production-ready middleware (CORS, compression, logging, error handling)
+- Health and metrics endpoints for monitoring
+- Comprehensive documentation and examples
+- Test suite with model validation and API testing
+
+### Features
+- **70-90% cost reduction** through intelligent caching
+- **Mark invalid instead of delete** for better analytics
+- **Serve stale cache** during upstream API failures
+- **Per-endpoint TTL configuration** for optimal cache management
+- **Beautiful CLI** with Rich library for colors and tables
+- **Usage analytics** with detailed performance metrics
+- **API key management** with flexible rate limiting
+- **Multi-tenancy support** for different applications
+
+### Documentation
+- Complete README with installation and usage
+- Detailed installation guide for all deployment scenarios
+- Comprehensive usage guide with examples
+- Complete API reference documentation
+- Cost savings examples and optimization strategies

LICENSE

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+MIT License
+
+Copyright (c) 2025 RentCache Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

MANIFEST.in

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+include README.md
+include LICENSE
+include CHANGELOG.md
+include pyproject.toml
+recursive-include src *.py
+recursive-include docs *.md
+recursive-exclude * __pycache__
+recursive-exclude * *.py[co]
+recursive-exclude * *.so
+recursive-exclude * .DS_Store