Document testing endpoint policy and mark version as 0.1.0-dev

- Updates AGENTS.md to clarify that production must keep invoice data

  on the same host as the model runtime, while shared LAN endpoints

  are acceptable for integration testing and staging.

- Bumps pyproject.toml version to 0.1.0-dev and adds development status

  classifiers.

- Adds CHANGELOG.md with Unreleased and 0.1.0 entries.

pyproject.toml

@@ -1,8 +1,13 @@
 [project]
 name = "odoo-ocr"
-version = "0.1.0"
+version = "0.1.0-dev"
 description = "Local-first invoice OCR pipeline that produces Odoo Enterprise XML."
 requires-python = ">=3.11"
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: MIT License",
+]
 dependencies = [
     "pydantic>=2.0",
     "pydantic-settings>=2.0",