fix(trekendsession): release v5.9.1 - eager-exec blocks crashed command load

Phase 3 (atomic-write) and Phase 4 (validator) used !`...` eager-exec
with unresolved runtime placeholders; the harness executes those at
command LOAD time, so zsh parsed <project-dir> as input redirection and
/trekendsession aborted before the model saw a single instruction.
Both blocks are now plain runtime Bash fences with {curly} placeholders
(shell-inert, trekplan.md convention) and absolute ${CLAUDE_PLUGIN_ROOT}
paths (cwd-relative plugin paths were a latent ERR_MODULE_NOT_FOUND in
any user repo). Phase 1 discovery block keeps its legitimate eager-exec.

Regression guard: new tests/commands/trekendsession.test.mjs flags any
!`-block in commands/*.md containing <angle>/{curly} placeholders, and
pins Phase 3/4 as runtime Bash. Suite 828 -> 832 (830/0/2). E2E: fixed
blocks run with real values write both state files, validator valid:true;
trekcontinue.md:147 runtime-verified self-contained.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013NXzF3F2zAM8S7FCBXCqAb

.claude-plugin/plugin.json

@@ -1,12 +1,23 @@
 {
   "name": "voyage",
   "description": "Voyage — brief, research, plan, execute, review, continue. Contract-driven Claude Code pipeline. /trekbrief, /trekplan, and /trekreview each end by building a self-contained operator-annotation HTML (scripts/annotate.mjs, modelled on claude-code-100x): select text or click any element, pick intent (Fiks/Endre/Spørsmål), write comment, copy structured prompt, paste back, Claude revises the .md.",
-  "version": "5.9.0",
+  "version": "5.9.1",
   "author": {
     "name": "Kjell Tore Guttormsen"
   },
   "homepage": "https://git.fromaitochitta.com/open/ktg-plugin-marketplace/src/branch/main/plugins/voyage",
   "repository": "https://git.fromaitochitta.com/open/ktg-plugin-marketplace.git",
   "license": "MIT",
-  "keywords": ["voyage", "trek", "planning", "implementation", "research", "context-engineering", "agents", "adversarial-review", "headless", "execution"]
+  "keywords": [
+    "voyage",
+    "trek",
+    "planning",
+    "implementation",
+    "research",
+    "context-engineering",
+    "agents",
+    "adversarial-review",
+    "headless",
+    "execution"
+  ]
 }