feat: project TableEvent results to table.evaluation/1.0

[chaoz23]

Summary

Projects dmcheck's native TableEvent evaluation into the shared
table.evaluation/1.0 contract defined by chaoz23/table-kit#11.

This is intentionally stacked on #8 (agent/table-event-adapter) because the
projection consumes that adapter's normalized event stream, blockers, cursor,
and exact source evidence.

Contract behavior

• adds dmcheck run-events <events> --gm <id> --table-evaluation
• emits deterministic evaluation identity and canonical input digest
• preserves exact TableEvent evidence references for every public finding
• reports aggregate and per-rule coverage plus checked-through cursor state
• distinguishes checked_clean, findings, incomplete, unsupported,
  invalid, and typed internal_error
• fails closed on gaps, redacted required content, zero-compatible streams,
  unsupported variants, malformed inputs, or findings without exact evidence
• always emits authority_status: self_attested; dmcheck cannot grant itself
  host authority

Validation

• isolated Python 3.10/3.12/3.14 CI-equivalent runs: 202 collected; 201
  passed, 1 expected platform skip, and 196 subtests passed on each runtime
• validated clean, findings, incomplete, unsupported, and invalid outputs
  against table-kit's actual table-evaluation-1.0.schema.json with format
  checking and its semantic conformance validator
• cold-wheel packaging test exercises the installed console command and shared
  fail-closed envelope outside the source checkout
• cold-installed dmcheck and current post-Add SKILL.md front door (check-family tune-up Phase 2) #12 table-kit wheels pass the hosted
  five-case boundary: checked-clean, exact-evidence findings, golden transport
  gap, deterministic legacy migration, and redacted content

Dependencies / sequencing

• feat: ingest table.event/1.0 streams fail closed #8 is merged as 116c8ed; this PR is rebased directly on main
• schema dependency Establish shared evaluation and event contracts table-kit#11 is merged as d066eea
• optional legacy producer/conformance path Add SKILL.md front door (check-family tune-up Phase 2) #12 is merged as 5543856
• no release or authority claim is included in this PR