chore: prepare AgentSeek 0.1.2 release

[webup]

Summary

• Bump the AgentSeek package and current release statements from 0.1.1 to 0.1.2.
• Update the root AgentSeek entry in uv.lock without changing any dependency, source, or hash.
• Keep the embedded template catalog at v0.1.0 and immutable README diagram assets at v0.1.1; those move only in the later catalog-refresh 0.1.3 release.

Release contract

agentseek dev now resolves the lifecycle dotenv once, overlays non-empty launch values, and reuses one immutable snapshot for readiness and every long-running child. Dotenv KEY= remains explicitly empty unless a non-empty launch value overrides it; one-shot agentseek task inheritance is unchanged. Missing, malformed, non-UTF-8, or subprocess-incompatible lifecycle dotenv input exits 2 before starting any child and never yields a partial snapshot. The supported parser window is python-dotenv>=1.0,<1.3. API lifecycle children require agentseek-api>=0.2.2.

Validation

• Full locked suite: 1,216 passed, 1 skipped.
• Release/version and lifecycle documentation suites: 79 passed.
• uv lock --locked: 223 packages; lock diff is only the root AgentSeek version.
• ty, all pre-commit hooks, and strict MkDocs build pass.
• Python 3.12 wheel and sdist build, Twine, protected-tag checks, vendored-skill artifact verification, and clean-wheel agentseek --version smoke pass.

Lock note

Fresh re-resolution currently follows an unpinned nested Bub Git source declared by the pinned bub-contrib commit, whose moving HEAD conflicts with the intentional PyPI bub==0.3.9 pin. This version-only release therefore updates only the root package version in the already-valid lock. Both CI-pinned uv 0.9.28 and host uv 0.10.2 accept the resulting lock with uv lock --locked; no dependency/source/hash bytes changed.