fix(#3131): re-wire 4 orphaned workflows as flags on parent commands

- discuss-phase --assumptions  → list-phase-assumptions.md
- pause-work --report          → session-report.md
- manager --analyze-deps       → analyze-dependencies.md
- import --from-gsd2           → gsd-tools.cjs from-gsd2 CLI

TDD: 8 new assertions in enh-2790-skill-consolidation.test.cjs
(argument-hint presence + body dispatch reference per flag).
Confirmed RED before wiring, GREEN after. Full suite 6971/6971.

help.md updated with all four new flag forms to satisfy
bug-2954-help-md-slash-command-stubs parity test.

Closes #3131

commands/gsd/pause-work.md

@@ -1,6 +1,7 @@
 ---
 name: gsd:pause-work
 description: Create context handoff when pausing work mid-phase
+argument-hint: "[--report]"
 allowed-tools:
   - Read
   - Write
@@ -27,6 +28,9 @@ State and phase progress are gathered in-workflow with targeted reads.
 </context>
 
 <process>
+If `--report` is in $ARGUMENTS:
+Read and execute `~/.claude/get-shit-done/workflows/session-report.md` end-to-end.
+
 **Follow the pause-work workflow** from `@~/.claude/get-shit-done/workflows/pause-work.md`.
 
 The workflow handles all logic including: