Task: Finalize Next and Go design documentation

Identity

Validate the fixed documentation integration head 064e155 against the source proposal, accepted human direction, canonical project memory, and repository diff.
Correct canonical integration metadata and prepare a documentation-only fast-forward merge into main.
Preserve the unrelated untracked runtime configuration task record already present in the occupied main worktree.

Merge only design and progress documentation; no application, Go, SQL, Docker, package, ACK, or runtime configuration changes.
Keep current ACK-001 implementation facts separate from accepted-but-unimplemented ADR-003.
Treat source feature and superseded integration task records as read-only.
Require task-aware drift validation and independent Sol review before updating main.

Validated that the integration range from main@a235266 through 064e155 changes only .project-docs.
Confirmed ADR-003 records the approved target while current state accurately says the Go migration has not started.
Corrected Integrated Through to include both the task-scoped design commit and canonical promotion commit.
No code or deployment artifact was integrated.

Inspected source task records, detailed proposal, ADR-003, decision index, system overview, module map, data flow, current state, history, and commitments.
git diff a235266..064e155 --name-status lists only project-document paths.
Task-aware drift check passed.
Independent final Sol review returned PASS with no blockers: all integrated changes are project documentation, ADR-003 remains implementation-pending, ACK-001 remains current truth, and the occupied main worktree's untracked runtime-config task record is byte-identical to the tracked integration blob.

Go implementation remains a future task gated by executable compatibility tests.
Live RDS/ACK/OSS/provider verification remains open for the currently implemented architecture.