v0.1.2

Features

• Added six offline examples covering client credentials, legacy delegated
  credentials, synchronous and asynchronous filesystem workflows, and URL
  workflows.
• Added NumPy-style public API documentation, doctest/signature checks, and
  sync/async contract checks.

Bugfixes

• Made async credential authentication use an explicit tenant authority and
  aligned async HTTP 401 handling with the synchronous client.
• Enforced object download boundaries and redacted provider, capability URL,
  and transport failure details from ordinary exceptions.
• Removed redundant synchronous folder lookups while preserving concurrent
  creator conflict recovery.
• Enforced the reviewed license deny-list policy.

Other

• Upgraded the isolated build frontend and clarified the async event-loop
  contract for local filesystem work.
• Replaced literal credential values in documentation with environment-backed
  examples.

Breaking Changes

• Async credential-based managers now require an explicit tenant_id; injected
  token providers remain exempt.