docs(ISI-1646): refresh README/docs/CHANGELOG for 0.7.0 + 0.8.0

[henrikrexed]

Docs v0.7.0 / v0.8.0 refresh (ISI-1646)

Brings README + telemetry docs + CHANGELOG current to main. Parent: ISI-1642. Authoritative source: ISI-1645 technical change summary, verified against src/semconv.ts, src/config.ts, src/hooks.ts and the released tags.

⚠️ Release-framing note (flagged ambiguity)

The parent title said "v0.0.8" and ISI-1645 framed ISI-1605 + ISI-1629 as "unreleased / expected 0.8.0". Since then 0.8.0 was tagged today (2026-07-08) and already contains ISI-1605 (plus ISI-1627, ISI-1628). ISI-1629 is still on a feature branch, not merged to main. This PR documents the true state:

Change	Documented as
ISI-1318 error_preview	0.7.0 (released)
ISI-1605 gen_ai content keys	0.8.0 (released today)
ISI-1629 tool-span enrichment	Unreleased (feature branch, not yet on main)

Changes

• README.md — replace stale "What's New in 0.6.0" with 0.8.0 + 0.7.0 sections; add an Unreleased block for ISI-1629; refresh the support matrix (0.7.x/0.8.x).
• CHANGELOG.md — add an [Unreleased] entry for ISI-1629; dedupe the doubled ISI-1605 (0.8.0) and ISI-1318 (0.7.0) lines.
• docs/telemetry/traces.md — document openclaw.tool.error_preview (0.7.0) and the ISI-1629 enrichment keys (marked unreleased).
• docs/configuration.md — document the 6th captureContent flag toolErrorMessages with its object-only default-on behavior table, the gen_ai.* mirrors, and the size caps.
• docs/backends/dynatrace.md — add an AI Observability section covering the gen_ai.* content keys and the traceloop.span.kind classifier.

Verification

• mkdocs build --strict — the only 2 warnings are pre-existing on main (getting-started.md → ../README.md#hooks… and traces.md:50 → ../../CHANGELOG.md); all new cross-page anchors resolve cleanly.
• Scope respected: no OC_COMPACTION_* env keys documented (those belong to ISI-1628).

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[henrikrexed]

can you review @copilot ?

[Copilot]

can you review @copilot ?

Reviewed all five changed files. Here's a summary of what I verified:

CHANGELOG.md ✅

• [Unreleased] entry for ISI-1629 is accurate (feature branch, not yet in a tagged release)
• Deduplication of the doubled ISI-1605 / ISI-1627 / ISI-1628 entries is correct — the kept commit hashes match the ones in the released 0.8.0 tag
• ISI-1318 (0.7.0) entry correctly adds the captureContent.toolErrorMessages gate detail that was missing before

README.md ✅

• Support matrix correctly reflects the current state: 0.6.x / 0.7.x superseded, 0.8.x active
• All three feature descriptions for 0.8.0 (ISI-1605, ISI-1627, ISI-1628) are accurate
• toolErrorMessages default-on behavior description for 0.7.0 matches src/config.ts:normalizeContentCapturePolicy
• ISI-1629 unreleased block correctly scoped to feature branch

docs/backends/dynatrace.md ✅

• All five gen_ai.* keys verified against src/semconv.ts
• traceloop.span.kind values (task / tool) verified against TRACELOOP_SPAN_KIND_TASK / TRACELOOP_SPAN_KIND_TOOL constants
• Correctly notes traceloop.span.kind emits unconditionally (no content gate) while gen_ai.* content keys are opt-in

docs/configuration.md ✅

• The toolErrorMessages default behavior table matches the code in src/config.ts exactly (object → default on, boolean false / omitted → off)
• gen_ai.* mirror documentation is accurate and tied to the correct captureContent flags

docs/telemetry/traces.md ✅

• openclaw.tool.error_preview attribute name, 1024-char cap, and redact-before-truncate order all verified against src/hooks.ts:248–256
• ISI-1629 unreleased keys correctly annotated in the table and in the note block

One pre-existing issue (not introduced by this PR): CHANGELOG.md for 0.6.1 still has duplicated bug fix entries — those can be addressed in a separate cleanup if desired.

No issues with the changes themselves. LGTM.