Claude review: drm/todo: clarify drm_syncobj error TODOs

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

**Purpose:** Prevent repeated "is anybody working on this?" emails by clarifying that the kernel side is done and only userspace work remains. Also adds Michel Dänzer as a second contact.

**Review:**

The changes are sensible and clearly motivated by the commit message. Two minor observations:

1. **Trailing space before closing parenthesis:**
   ```
   +(patches are on the dri-devel mailing list ) but adding support for that in the
   ```
   There's a stray space before the `)` — `mailing list )` should be `mailing list)`. This is a cosmetic nit but worth fixing since it's a documentation file that humans will read.

2. **Pre-existing typo `complection`** (line 894 in current tree / line 110 context in the patch):
   ```
   complection of submission.
   ```
   This should be `completion`. It's not introduced by this patch — it's pre-existing — but since the patch is already touching this section, it would be a nice drive-by fix to correct it. Not a blocker.

3. **Vagueness about kernel patches:** The text says "patches are on the dri-devel mailing list" without a link or series identifier. It might be helpful to readers to include a Message-Id or link-to-lore reference so they can find the actual kernel patches, but this is optional.

4. **Level unchanged at "Starter":** Since the kernel work is done and only userspace remains, keeping this as "Starter" seems appropriate — userspace integration work is a reasonable entry point for new contributors.

**Overall: The patch is good to go with the trivial whitespace fix (`mailing list )` → `mailing list)`).**

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