fix(cli): render full-fidelity values for cluster read/subscribe/invoke

[p0fi]

Summary

• --format table output for cluster read, subscribe, and invoke now renders decoded TLV values at full fidelity: struct fields and array elements are never elided, and scalar leaves (long strings, byte-array hex dumps) are never middle-truncated.
• Introduces tlvFidelity (fidelityCompact / fidelityFull), threaded explicitly through formatAttrValue → decodeTLVValue → formatTLVElement → formatTLVContainer → truncateMiddle and buildReadRecords, so the elision/truncation policy is an explicit per-consumer choice instead of one shared 40-character budget.
• tree -L 4's per-attribute preview keeps today's compact, elided rendering unchanged — it's the one remaining consumer that opts into fidelityCompact.
• --format json/--format yaml output is unaffected; it already rendered the untruncated native Value.

Test plan

• TestDecodeTLVValue_Containers extended to run existing cases (short array, struct) under both fidelities, plus new cases: long array (compact truncates / full shows everything), array-of-structs (compact elides fields / full shows every field), wide struct >40 chars (compact elides / full shows every field), and long scalar leaves — string and byte-array (compact middle-truncates / full prints in full).
• TestBuildReadRecords_TruncationIsDisplayOnly split into compact/full subtests; both still assert Value is always the untruncated native original.
• mise run test — full suite passes.
• mise run lint — clean.
• Reviewed via /code-review (parallel Standards + Spec sub-agents against issue cluster read table output cuts fields out of long struct values #95): 0 hard standards violations, 0 spec discrepancies.

Fixes #95

🤖 Generated with Claude Code

[Copilot]

🟢 Approval recommended

The fidelity policy is consistently applied, preserves existing tree behavior, and has focused regression coverage.

Pull request overview

Adds explicit TLV display fidelity so targeted CLI operations show complete values while tree previews remain compact.

Changes:

• Threads compact/full fidelity through TLV formatting.
• Uses full fidelity for read, subscribe, and invoke; compact fidelity for tree -L 4.
• Expands tests for containers, nested structures, strings, bytes, and native values.

File summaries

File	Description
cli/cluster.go	Implements fidelity-aware TLV formatting and updates consumers.
cli/subscribe.go	Enables full-fidelity subscription displays.
cli/tree.go	Preserves compact tree previews.
cli/output/read.go	Documents fidelity-dependent display behavior.
cli/cluster_test.go	Tests compact and full TLV formatting.
cli/cluster_read_test.go	Tests display fidelity without affecting native values.

Review details

• Files reviewed: 6/6 changed files
• Comments generated: 0
• Review effort level: Balanced

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