docs: update coverage documentation

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Automated documentation sweep — updates README coverage matrix, COVERAGE.md, and per-language READMEs to reflect the current state of recipes/.

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@deepgram/devrel — VP escalation: PR #517 has been stuck for >12 days. No CI checks have run and no review decision. Manual review needed.

State: labels=[type:docs], checks=none, reviewDecision=none

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@deepgram/devrel — VP escalation: PR #517 has been open for 13 days and now has merge conflicts (likely from overlapping docs changes). Needs rebase or re-generation.

State: labels=[type:docs], mergeable=CONFLICTING, no checks

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VP check (2026-04-24 16:37 UTC): PR still stuck (16+ days). Previously escalated to @deepgram/devrel. Merge conflicts appear resolved but still no CI checks or review. Awaiting manual review.

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@deepgram/devrel — VP escalation: PR #517 has no CI checks and has been open >24h. The VP agent cannot dispatch workflows (GITHUB_TOKEN 403). Manual re-trigger of CI needed.

[claude]

@deepgram/devrel — VP escalation: PR #517 has been stuck since 2026-04-08 with no CI checks running. Re-trigger via workflow_dispatch returned 403. Manual review needed.

State: labels=[type:docs], checks=none

[claude]

@deepgram/devrel — VP escalation: PR #517 has been stuck for >24 hours and workflow re-trigger attempts failed (HTTP 403 — GITHUB_TOKEN lacks workflow dispatch permission). Manual review needed.

State: No CI checks have run. Needs manual trigger of Lead — Test workflow or direct review.