feat(local): deepen local search evidence

[iannuttall]

Summary\n\n- retain typed local-pack listing evidence from bounded live result snapshots\n- add deterministic local organic competitor and listing summaries\n- add optional Google Analytics geography context joined only by retained landing-page path\n- keep Search Console as the first-party demand source and label every external source separately\n- keep the report on the existing discover, describe, and generic run surface\n- document the combined evidence flow across the README, website, router skill, report guidance, and agent rules\n\n## Evidence and safety\n\n- exact market, language, device, cache, cost, row caps, invalid rows, and partial states remain visible\n- Analytics geography is joined only to retained landing pages and is never assigned to a Search Console query\n- local listings and recurring domains remain observations until classified or verified\n- all provider work, report lists, structured output, storage, and network acquisition are bounded\n- no credentials, provider payloads, or private site data are included\n\n## Verification\n\n- full build, typecheck, test, and lint gates pass\n- 1,030 core tests and 163 CLI tests pass\n- 71 report evals and one router skill validate\n- 50,000-row local-search resource case: 189 ms, 30.1 MiB RSS growth, 75,933-byte output\n- live Search Console corpus pass across 29 connected properties\n- live Google Analytics evidence confirmed exact page joins, 10,000-row cap provenance, missing-path handling, and unchanged first-party findings\n- live DataForSEO local result pass confirmed local packs, recurring domains, exact market/device evidence, charged cost, zero-cost cache reuse, and deterministic output\n- packed seo@0.2.26 installs and runs outside the workspace in three clean environments\n- dependency audit and repository secret scan pass