ci: add release-please automation

- .release-please-manifest.json: tracks current version (0.1.0)
- release-please-config.json: Python release type, changelog-sections
- .github/workflows/release-please.yml: workflow for automated releases
- CHANGELOG.md: initial changelog

Commit types that trigger releases: feat, fix, perf, security, revert
Hidden types (no release): docs, chore, refactor, style, test, ci, build

Author: 27Bslash6

.github/workflows/release-please.yml

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+name: Release Please
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    outputs:
+      release_created: ${{ steps.release.outputs.release_created }}
+      tag_name: ${{ steps.release.outputs.tag_name }}
+      version: ${{ steps.release.outputs.version }}
+    steps:
+      - name: Run release-please
+        id: release
+        uses: googleapis/release-please-action@v4
+        with:
+          release-type: python
+          manifest-file: .release-please-manifest.json
+          config-file: release-please-config.json
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+  # Future: Add PyPI publish job here
+  # publish:
+  #   needs: release-please
+  #   if: needs.release-please.outputs.release_created
+  #   runs-on: ubuntu-latest
+  #   steps:
+  #     - uses: actions/checkout@v4
+  #     - name: Build and publish to PyPI
+  #       ...

.release-please-manifest.json

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+{
+  ".": "0.1.0"
+}

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](https://github.com/cachekit-io/cachekit-py/releases/tag/v0.1.0) (2025-12-11)
+
+### Features
+
+* Initial release of cachekit
+* Two-tier caching (L1 in-memory + L2 Redis)
+* Zero-knowledge encryption with `@cache.secure`
+* Circuit breaker for Redis fault tolerance
+* Distributed locking to prevent cache stampedes
+* Adaptive timeouts based on Redis latency
+* MessagePack serialization with LZ4 compression

release-please-config.json

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+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "release-type": "python",
+  "changelog-sections": [
+    {"type": "feat", "section": "Features"},
+    {"type": "fix", "section": "Bug Fixes"},
+    {"type": "perf", "section": "Performance Improvements"},
+    {"type": "security", "section": "Security"},
+    {"type": "revert", "section": "Reverts"},
+    {"type": "docs", "section": "Documentation", "hidden": true},
+    {"type": "chore", "section": "Miscellaneous", "hidden": true},
+    {"type": "refactor", "section": "Code Refactoring", "hidden": true},
+    {"type": "style", "section": "Styles", "hidden": true},
+    {"type": "test", "section": "Tests", "hidden": true},
+    {"type": "ci", "section": "CI/CD", "hidden": true},
+    {"type": "build", "section": "Build System", "hidden": true}
+  ],
+  "packages": {
+    ".": {
+      "package-name": "cachekit",
+      "changelog-path": "CHANGELOG.md"
+    }
+  }
+}