v1.11.0: the delivery ladder, verified tightening

Model output tends to be word-dense, and the reader wants the shortest path to the answer. This release measures that and, when asked, tightens it without dropping any request term, on the same verified ladder Forum uses for intent and routing.

• Delivery floor: forum.delivery.assess(text) measures concision deterministically (sentence length, filler ratio) and flags a dense or padded answer. Witnessed every run, zero-dependency. A floor on concision, not a judgment of cohesion.
• Verified tightening: opt in with Orchestrator(reviser=...). When the floor flags, Forum pulls a tighter version from the Reviser seam and accepts it only if it is strictly shorter AND still covers the request's terms (forum.intent.coverage). That guard is lexical, not semantic: an accepted revision drops no request term, but meaning is not proven preserved. A failing revision, or a crashing reviser, is recorded and discarded; the original stands. The default NullReviser keeps Forum standing alone.
• The accepted revision is witnessed as the delivered result, and the summary and forum bench report delivery checks and revisions.

Pure standard library core; the reviser is a model behind the seam, its output verified deterministically. 244 tests, plus 2 gated real-model tests.

Install: pip install forum-engine