v0.5.50 release (latest)

v0.5.50 release notes for the GitHub Release v0.5.50 (release task: Issue #1417).

Tag state (verified against origin)

Ref	Object	Points at
`v0.5.50`	annotated tag `653fc57d0c87fecf0e63d98934fcb331a0584b8c`	commit `13185db8f99db33e1798a140f7b5584b96f81256`

DeepSeek template caps deepseek-flash at 131072 context although the model has 1M: 42% of Orbi’s own deliveries hit compaction (Issue #1411; PR #1413)

Delivery commits are credited to a stranger’s account or to no one: set Orbi’s bot identity once at Runner startup (Issue #1416; PR #1418)