docs(voteballots): add Vote PoC chain governance closure snapshot

[Foundup]

Summary

• Locks Vote PoC chain in implementation-complete, not-public-launched state
• Records all 6 merged slices with their merge commits
• Defines re-open criteria V1-V8 for any future Vote work
• DOCS-ONLY: No code, test, manifest, or registry changes

Six-Slice Canonical Chain

Slice	PR	Merge Commit
Slice 1: FEC Adapter	#707	15de3d3
Slice 2: Entity Resolution	#709	b5b3eea
Slice 3: Funding Summary	#710	1a3d06b
Slice 4: Confidence Scoring	#712	4559a8e
Slice 5: Quick Answer	#713	7895459
Slice 6: Shell Integration	#714	7e4e571

Re-Open Criteria

ID	Criterion	Required Packet
V1	Live FEC API activation	VOTE_POC_LIVE_FEC_BOUNDARY_PHASE1
V2	Public route/entry_url activation	VOTE_POC_PUBLIC_ROUTE_ACTIVATION_PHASE1
V3	Registry/entity promotion	VOTE_POC_REGISTRY_PROMOTION_PHASE1
V4	Persuasion/recommendation/targeting	VOTE_POC_POLITICAL_SAFETY_REVIEW_PHASE1
V5	Confidence rule change	VOTE_POC_CONFIDENCE_RULE_REVIEW_PHASE2
V6	Quick-answer LLM/new facts	VOTE_POC_ANSWER_GENERATION_BOUNDARY_PHASE2
V7	Manifest/CABR/payout/DAO claim	VOTE_POC_GOVERNANCE_BOUNDARY_PHASE1
V8	Shell contract change	VOTE_POC_SHELL_CONTRACT_PHASE2

Test Plan

• Tests: 303 passed (verified, no change)
• entry_url remains empty
• launch_readiness remains "discoverable_only"
• No code/test files modified
• No manifest/registry/catalog/projection modified
• DOCS-ONLY verified

Critical Statement

Implementation-complete does NOT mean public-launched.

Worker-Lane: W9
Slice: VOTE_POC_CHAIN_OBSERVATION_SNAPSHOT_PHASE1

🤖 Generated with Claude Code