fix: hook version tracking, stale hook detection, stdin timeout, and session-report command (#1153, #1157, #1161, #1162) (#1163)

* fix: hook version tracking, stale hook detection, and stdin timeout increase

- Add gsd-hook-version header to all hook files for version tracking (#1153)
- Install.js now stamps current version into hooks during installation
- gsd-check-update.js detects stale hooks by comparing version headers
- gsd-statusline.js shows warning when stale hooks are detected
- Increase context monitor stdin timeout from 3s to 10s (#1162)
- Set +x permission on hook files during installation (#1162)

Fixes #1153, #1162, #1161

* feat: add /gsd:session-report command for post-session summary generation

Adds a new command that generates SESSION_REPORT.md with:
- Work performed summary (phases touched, commits, files changed)
- Key outcomes and decisions made
- Active blockers and open items
- Estimated resource usage metrics

Reports are written to .planning/reports/ with date-stamped filenames.

Closes #1157

* test: update expected skill count from 39 to 40 for new session-report command

commands/gsd/session-report.md

@@ -0,0 +1,19 @@
+---
+name: gsd:session-report
+description: Generate a session report with token usage estimates, work summary, and outcomes
+allowed-tools:
+  - Read
+  - Bash
+  - Write
+---
+<objective>
+Generate a structured SESSION_REPORT.md document capturing session outcomes, work performed, and estimated resource usage. Provides a shareable artifact for post-session review.
+</objective>
+
+<execution_context>
+@~/.claude/get-shit-done/workflows/session-report.md
+</execution_context>
+
+<process>
+Execute the session-report workflow from @~/.claude/get-shit-done/workflows/session-report.md end-to-end.
+</process>