feat(mem0-plugin): complete all Tier 1-8 spec items, add scheduled dream and bash error detection

- Add /mem0:dream --schedule support via Claude Code /schedule command
  with local launchd/cron fallback for non-cloud users
- Add /mem0:digest --schedule and file output to ~/.mem0/weekly-digest.md
  with digest-history.log for trend tracking
- Add on_post_commit.sh PostToolUse hook: interactive prompt after git
  commit asking user to save change as memory with category suggestion
- Add on_bash_output.sh PostToolUse hook: detects stack traces and error
  patterns in bash command output, injects mem0 search rubric for prior
  occurrences (complements existing user prompt error detection)
- Fix session-end report: now shows per-category breakdown
  "wrote 3 memories (decision 2, anti_pattern 1)" matching spec
- Wire new hooks into all 3 platforms (Claude Code, Cursor, Codex)
- Add post_commit and bash_error telemetry events
- Add CTO demo testing guide with tier-by-tier manual test steps

mem0-plugin/hooks/codex-hooks.json

@@ -34,6 +34,26 @@
             "timeout": 3
           }
         ]
+      },
+      {
+        "matcher": "Bash",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "${CODEX_PLUGIN_ROOT}/scripts/on_post_commit.sh",
+            "timeout": 5
+          }
+        ]
+      },
+      {
+        "matcher": "Bash",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "${CODEX_PLUGIN_ROOT}/scripts/on_bash_output.sh",
+            "timeout": 5
+          }
+        ]
       }
     ],
     "Stop": [