build(deps): align consumers on AXorcist 0.2.2

[steipete]

Summary

Aligns Peekaboo on AXorcist 0.2.2, which was just published. The internal submodule moves to the signed v0.2.2 tag, and the public root Package.swift pin moves from exact: "0.2.1" to exact: "0.2.2". That gives SwiftPM consumers of Peekaboo's library products, such as OpenClaw, the idle-observer CPU fix from #1005/#1013. The SwiftPM consumer contract test and docs/building.md follow, matching the 0.2.1 alignment in #925.

Beyond the CPU fix already on main (AXorcist #96), 0.2.2 adds AXorcist #97: the deprecated AXObserverManager.removeObserver(for:notification:) now reports a fast native removal failure every time instead of retrying in-call.

Validation

• bash scripts/test-swiftpm-consumer.sh resolves AXorcist 0.2.2 from the published tag, builds a consumer of all four public products, and confirms the exact pin.
• AXorcist 0.2.2: 295 tests, make check, CI on Swift 6.2.4 and 6.4.0, and CodeQL all pass. Its axorc binaries are Developer ID-signed and notarized.

[clawsweeper]

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[cursor]

PR Summary

Low Risk
Dependency version bump and docs/test expectations only; no application logic changes in this diff.

Overview
Bumps the public SwiftPM AXorcist pin from exact: "0.2.1" to 0.2.2 so consumers of Peekaboo’s library products resolve the same release as the internal submodule.

The Unreleased changelog entry documents what 0.2.2 brings for SwiftPM users (idle-observer CPU fix, collectAll timeout handling, observation subscriptions, fast observer-removal failures). docs/building.md and scripts/test-swiftpm-consumer.sh are updated to match the new exact pin, mirroring the prior 0.2.1 alignment.

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