docs(plugins): restore the telemetry sweep this branch's merge reverted

The pr4 -> pr5 merge resolved eleven documentation files to the pre-sweep
side, undoing aa770aa6 in its entirety. Because the stack lands in order,
main would have taken the corrected wording in pr1 and then had it reverted
by pr5, leaving the shipped claim wrong again:

- all six hosts' pause skill back to "a minimal anonymous telemetry ping"
- docs/integrations/deepseek-plugin.mdx back to "Anonymous usage events"
- integrations/zapier-mem0/README.md back to advertising telemetry the app
  does not have, with an MEM0_TELEMETRY opt-out that controls nothing
- the README data-dir listing back to omitting telemetry-salt and
  install-state.json, both of which this stack creates
- the README and docs property lists back to the enumeration that drifts

Restored verbatim from pr4. No file here is in pr5's scope, and the full
pr4..pr5 diff is now surface headers only.

Claude-Session: https://claude.ai/code/session_01C7tEmH86HAr7GoAAKCEHZb

docs/integrations/claude-code.mdx

@@ -183,11 +183,16 @@ the same way the Python SDK and the CLI attribute theirs. Without a key they
 are sent under a random per-machine id.
 
 Each event carries the event name, the plugin version, the harness it ran in,
-your OS and Python version, timings, counts, and a coarse failure label.
-Repository and session identifiers are hashed with a random salt generated on
-your machine and never sent, so they cannot be linked back to a repository name
+your OS and Python version, and per-event properties describing what happened:
+timings, counts, coarse outcome and failure labels, and which model was
+configured. Repository and session identifiers are hashed with a random salt
+generated on your machine, so they cannot be linked back to a repository name
 or path.
 
+The exact set is enforced in code rather than by this list: every property is
+filtered through a denylist of sensitive keys and credential-shaped values are
+redacted before anything is sent.
+
 Prompts, memory text, queries, file paths, repository names, and API keys are
 never sent.