docs(agents): finalize economy census closeout

[blakinio]

Lifecycle-only closeout after the corrected economy-panel static promotion.

This PR changes exactly one already-archived task record to replace pre-merge wording with terminal facts:

• source Draft docs(track-a): census economy panels static evidence #546: CLOSED, unmerged, superseded;
• promotion docs(track-a): promote economy panel static census #547: MERGED as e2c1fa0af020c83a992652a50391d48b85aa111e;
• promotion final head f4457058c879d92a466647cf032160b800b6e90c;
• final promotion CI 32220130000 = SUCCESS;
• final independent coordinator review 4968756312, 0 open material findings;
• source Track A governance 32219366592 = SUCCESS and CI 32219366648 = SUCCESS;
• ownership released;
• E2E NOT_APPLICABLE for the static subtask (runtime_access: none, physical_e2e_required: false).

No research conclusion, runtime authority, shared #536 coverage path, login state, or client behavior is changed.

[blakinio]

Lifecycle-only closeout audit on exact head 88498f83a7d4c957da55bd34d0d82db251bbb4a7.

Verified diff: exactly one path, docs/agents/tasks/archive/OTC-20260819-track-a-economy-panels-static-census.md.

The change only replaces pre-merge closeout wording with terminal verified facts: source #546 closed unmerged/superseded; promotion #547 merged as e2c1fa0af020c83a992652a50391d48b85aa111e from final head f4457058c879d92a466647cf032160b800b6e90c; source governance 32219366592 SUCCESS; source CI 32219366648 SUCCESS; promotion exact-head CI 32220130000 SUCCESS; final promotion coordinator review 4968756312; open material findings 0; ownership released; static E2E NOT_APPLICABLE.

Closeout exact-head CI 32220331629 = SUCCESS. Review threads = 0. No research semantics, runtime authority, shared #536 path, or client behavior changed.

Result: PASS.