docs: v1.41.0 release documentation — CHANGELOG promotion, release notes, FEATURES update (#3219)

- Promote CHANGELOG [Unreleased] → [1.41.0] - 2026-05-07; add fresh [Unreleased] header
- Fix CONFIGURATION.md version labels: 'added in v1.40' → 'added in v1.41' for models and dynamic_routing
- Create docs/RELEASE-v1.41.0.md in compact v1.39.0 bullet format
- Rewrite docs/RELEASE-v1.40.0-rc.1.md to compact bullet format (removes wall-of-text entries)
- Add docs/FEATURES.md v1.41.0 section (features 126–131: per-phase models, dynamic routing, update banner, issue-driven orchestration, graphify staleness, MVP SDK verbs)
- Update docs/FEATURES.md TOC
- Trim README "Notable extras" table (highlight page, not a command menu)

Fixes #3218

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/CONFIGURATION.md

@@ -697,7 +697,7 @@ OpenCode's `task` interface do not accept an inline `model` parameter, so
 running `gsd install <runtime>` after editing `model_overrides` is required
 for the change to take effect. See issue #2256.
 
-### Per-Phase-Type Models (`models`) — added in v1.40
+### Per-Phase-Type Models (`models`) — added in v1.41
 
 > Express tuning at the **phase** level (planning, research, execution, verification) without learning the agent taxonomy. Added in [#3023](https://github.com/gsd-build/get-shit-done/pull/3030).
 
@@ -781,7 +781,7 @@ $ gsd config-set models.research sonnet
 
 Direct edits to `.planning/config.json` are looser — the resolver simply ignores values it doesn't recognize and falls through to the profile tier — so a typo doesn't silently break tier resolution.
 
-### Dynamic Routing with Failure-Tier Escalation (`dynamic_routing`) — added in v1.40
+### Dynamic Routing with Failure-Tier Escalation (`dynamic_routing`) — added in v1.41
 
 > Start cheap, escalate only when the agent fails the gate. Added in [#3024](https://github.com/gsd-build/get-shit-done/pull/3031).