dns: bump to v0.7.0-dev.2

[scotwells]

Bumps the dns plugin preview to v0.7.0-dev.2, still a pre-release for early feedback.

Three readability fixes to datumctl dns record list, all in the default table only — -o wide and -o json are unchanged and still give the full text:

• Long values are shortened. tabwriter sizes a column to its widest cell, so one 400-byte DKIM key pushed STATUS off the right of every row in the table. The cost of one long value was paid by every short one.
• Machine-written names are shortened. Verification tokens and ACME challenge labels run far past what human-authored records need; the cutoff keeps the latter intact.
• --no-managed lists only the records you wrote, hiding the ones Datum manages on your behalf.

A footer names how many cells were shortened and points at -o wide / -o json, so nothing is silently hidden.

Upstream PRs: datum-cloud/dns-operator#107, datum-cloud/dns-operator#108, datum-cloud/dns-operator#109

🤖 Generated with Claude Code

[scotwells]

CI hasn't picked this up yet — GitHub Actions is in a major outage and no pull_request run was created for this PR (or for a test PR I opened and closed). Nothing is wrong with the manifest; the event was dropped.

I ran both validation steps locally in the meantime, exactly as validate-pr.yaml does:

• Schema — ajv validate -s schema/plugin-v1alpha1.json --spec=draft7 -c ajv-formats → valid
• URIs resolve and SHA256 matches — all five assets downloaded and hashed:

platform	sha256
linux/amd64	5976ac38… OK
linux/arm64	1745d036… OK
darwin/amd64	73c43480… OK
darwin/arm64	9655a0e2… OK
windows/amd64	96eddb1a… OK

I'll push an empty commit to retrigger once Actions recovers, so this still merges on a real green run rather than on my say-so.

[scotwells]

Actions has recovered and validate passed on a1012ff1 (schema + all five SHA256s), matching what I'd verified locally.

Correction to my earlier comment: the original event wasn't dropped, just badly delayed — the run for 578bbc7b was eventually delivered off the throttled queue and also passed. Both runs are green.

Only a review stands between this and merge.