Add PyPI metadata and install test protocol

- Add description, license, authors, keywords, classifiers, and project
  URLs to crates/iscc-py/pyproject.toml for proper PyPI presentation
- Add scripts/test_install.py to verify published packages are installable
  from PyPI, crates.io, npm, and Go proxy with conformance smoke tests
- Add mise run test:install task

Author: CID Agent

crates/iscc-py/pyproject.toml

@@ -4,14 +4,35 @@ build-backend = "maturin"
 
 [project]
 name = "iscc-lib"
+description = "High-performance Python bindings for ISO 24138:2024 (ISCC)"
 dynamic = ["version"]
 readme = "README.md"
 requires-python = ">=3.10"
+license = "Apache-2.0"
+authors = [{ name = "Titusz Pan", email = "tp@py7.de" }]
+keywords = ["iscc", "content-id", "media", "fingerprint", "iso24138"]
 classifiers = [
+  "Development Status :: 2 - Pre-Alpha",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: Apache Software License",
   "Programming Language :: Rust",
   "Programming Language :: Python :: Implementation :: CPython",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
+  "Topic :: Multimedia",
+  "Topic :: Scientific/Engineering :: Information Analysis",
+  "Topic :: Software Development :: Libraries",
 ]
 
+[project.urls]
+Homepage = "https://lib.iscc.codes"
+Repository = "https://github.com/iscc/iscc-lib"
+Documentation = "https://lib.iscc.codes"
+Issues = "https://github.com/iscc/iscc-lib/issues"
+
 [tool.maturin]
 features = ["pyo3/extension-module"]
 python-source = "python"

mise.toml

@@ -72,6 +72,12 @@ cargo test --workspace &&
 uv run pytest
 """
 
+# --- Release verification ---
+
+[tasks."test:install"]
+description = "Test published packages are installable from registries"
+run = "uv run scripts/test_install.py {{arg(name='flags', i=0, default='--version 0.0.1')}}"
+
 # --- Version ---
 
 [tasks."version:sync"]