v0.2.3

Fix retries and interrupted-session recovery on DeepSeek Harness 0.1.5-rc.2. The plugin now reads session.snapshotEvents() while retaining compatibility with the older session.events API.

Previously, errors such as STREAM_CLOSED could terminate with Cannot read properties of undefined (reading 'length') before a retry was scheduled. Retry limits, durable checkpoints, and downstream policy precedence are preserved.

Validation: 36 tests pass; controlled checks against the installed DSH 0.1.5-rc.2 Session confirm two retries, budget exhaustion, persistence checkpoints, and empty-session recovery.