memory: dream cleanup — dedup DM memory, correct Mail.Send fact, fix index dup

- Merge duplicate DM memories into canonical feedback_dm_wrapping_commands_to_mike
  (points at the productized discord-dm skill; keeps UA/Cloudflare-1010 + 50109
  gotchas); git rm the session-created feedback_dm_wrapped_command_lines duplicate.
- feedback_365_remediation_tool: record that Exchange Operator HAS Graph Mail.Send/
  Mail.ReadWrite (corrects an earlier "suite has no Mail.Send") + the EXO-vs-Graph
  token-audience gotcha + Get-MessageTraceV2 + fresh-onboard EXO 401 propagation.
- Remove a duplicate MEMORY.md index line --apply-safe added from a false-orphan.
- Log the memory-dream false-orphan/dup-index defect to errorlog for skill linting.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

errorlog.md

@@ -17,6 +17,8 @@ Categories (the `[type]` tag): _(none)_ = skill/command execution failure ·
 
 <!-- Append entries below this line -->
 
+2026-06-15 | GURU-5070 | memory-dream (--apply-safe) | flagged feedback_broken_backlinks_are_writeme_markers.md as an orphan and appended a DUPLICATE index line though it already had one — orphan detector likely keys on the frontmatter name: slug, not the (file.md) link target. Fix the index-line matching to compare by filename [ctx: mode=apply-safe]
+
 2026-06-15 | GURU-5070 | powershell/var-case | [friction] PowerShell vars are case-INSENSITIVE: $gUid silently overwrote $guid (GPO id), Set-ADObject hit a bad DN and left GPT.ini/AD versionNumber inconsistent until fixed. Never rely on case to distinguish PS variables
 
 2026-06-15 | GURU-5070 | python/argv-limit | [friction] passed full /api/agents JSON (248 agents) as a python CLI arg -> 'Argument list too long' on Windows. Pipe large payloads via stdin, not argv