docs: add Agent Canvas Docker observability guidance - #608

Running Vale across on the following files affected by this PR:

- openhands/usage/agent-canvas/backend-setup/docker.mdx
- openhands/usage/agent-canvas/setup.mdx
- sdk/guides/observability.mdx

Attempting to initialize Vale linter...
No customer vale configuration detected. Using Mintlify's default configuration.
Attempting to run Vale spellcheck...
Vale spellcheck completed successfully.

openhands/usage/agent-canvas/backend-setup/docker.mdx:
	- 3:49       Did you really mean 'sandboxed'?
	- 20:5       Did you really mean 'mkdir'?
	- 59:113     Did you really mean 'Grafana'?
	- 59:139     Did you really mean 'Datadog'?
	- 77:29      Did you really mean 'toolchain'?
	- 108:40     Did you really mean 'rootfs'?
	- 157:112    Did you really mean 'Grafana'?
	- 157:127    Did you really mean 'Datadog'?
	- 159:128    Did you really mean 'Grafana'?

openhands/usage/agent-canvas/setup.mdx:
	- 6:146      Did you really mean 'npx'?
	- 9:37       Did you really mean 'untrusted'?
	- 18:5       Did you really mean 'npx'?
	- 23:173     Did you really mean 'sandboxing'?
	- 68:3       Did you really mean 'Termux'?
	- 124:17     Did you really mean 'npx'?
	- 311:142    Did you really mean 'runtimes'?
	- 327:102    Did you really mean 'runtimes'?

sdk/guides/observability.mdx:
	- 3:112      Did you really mean 'MLflow'?
	- 15:55      Did you really mean 'Datadog'?
	- 44:22      Did you really mean 'walkthroughs'?
	- 56:78      Did you really mean 'Laminar's'?
	- 62:131     Did you really mean 'Laminar's'?
	- 209:11     Did you really mean 'protobuf'?
	- 210:45     Did you really mean 'protobuf'?
	- 247:277    Did you really mean 'Laminar's'?
	- 249:34     Did you really mean 'Laminar's'?
	- 249:282    Did you really mean 'Laminar's'?
	- 253:5      Did you really mean 'MLflow'?
	- 257:15     Did you really mean 'MLflow'?
	- 264:71     Did you really mean 'MLflow'?
	- 275:17     Did you really mean 'MLflow'?
	- 374:43     Did you really mean 'Laminar's'?
	- 403:37     Did you really mean 'unsetting'?
	- 468:65     Did you really mean 'LLMs'?


Found 34 suggested changes across 3 files in 448.57ms