CLI: add root --help fast path and lazy channel option resolution (#30975)

* CLI argv: add strict root help invocation guard

* Entry: add root help fast-path bootstrap bypass

* CLI context: lazily resolve channel options

* CLI context tests: cover lazy channel option resolution

* CLI argv tests: cover root help invocation detection

* Changelog: note additional startup path optimizations

* Changelog: split startup follow-up into #30975 entry

* CLI channel options: load precomputed startup metadata

* CLI channel options tests: cover precomputed metadata path

* Build: generate CLI startup metadata during build

* Build script: invoke CLI startup metadata generator

* CLI routes: preload plugins for routed health

* CLI routes tests: assert health plugin preload

* CLI: add experimental bundled entry and snapshot helper

* Tools: compare CLI startup entries in benchmark script

* Docs: add startup tuning notes for Pi and VM hosts

* CLI: drop bundled entry runtime toggle

* Build: remove bundled and snapshot scripts

* Tools: remove bundled-entry benchmark shortcut

* Docs: remove bundled startup bench examples

* Docs: remove Pi bundled entry mention

* Docs: remove VM bundled entry mention

* Changelog: remove bundled startup follow-up claims

* Build: remove snapshot helper script

* Build: remove CLI bundle tsdown config

* Doctor: add low-power startup optimization hints

* Doctor: run startup optimization hint checks

* Doctor tests: cover startup optimization host targeting

* Doctor tests: mock startup optimization note export

* CLI argv: require strict root-only help fast path

* CLI argv tests: cover mixed root-help invocations

* CLI channel options: merge metadata with runtime catalog

* CLI channel options tests: assert dynamic catalog merge

* Changelog: align #30975 startup follow-up scope

* Docs tests: remove secondary-entry startup bench note

* Docs Pi: add systemd recovery reference link

* Docs VPS: add systemd recovery reference link

docs/vps.md

@@ -69,3 +69,34 @@ source ~/.bashrc
 - `OPENCLAW_NO_RESPAWN=1` avoids extra startup overhead from a self-respawn path.
 - First command run warms cache; subsequent runs are faster.
 - For Raspberry Pi specifics, see [Raspberry Pi](/platforms/raspberry-pi).
+
+### systemd tuning checklist (optional)
+
+For VM hosts using `systemd`, consider:
+
+- Add service env for stable startup path:
+  - `OPENCLAW_NO_RESPAWN=1`
+  - `NODE_COMPILE_CACHE=/var/tmp/openclaw-compile-cache`
+- Keep restart behavior explicit:
+  - `Restart=always`
+  - `RestartSec=2`
+  - `TimeoutStartSec=90`
+- Prefer SSD-backed disks for state/cache paths to reduce random-I/O cold-start penalties.
+
+Example:
+
+```bash
+sudo systemctl edit openclaw
+```
+
+```ini
+[Service]
+Environment=OPENCLAW_NO_RESPAWN=1
+Environment=NODE_COMPILE_CACHE=/var/tmp/openclaw-compile-cache
+Restart=always
+RestartSec=2
+TimeoutStartSec=90
+```
+
+How `Restart=` policies help automated recovery:
+[systemd can automate service recovery](https://www.redhat.com/en/blog/systemd-automate-recovery).