feat(#2630): phase-estimation module, smart-zone config key, and cli verbs (#2661)

* feat(#2630): add phase-estimation module, smart-zone config key, and cli verbs

* fix(#2630): document smart_zone_tokens, refresh golden fixtures, fix null-proto property assertions

* fix(#2630): align smart_zone_tokens write/read validation and harden estimation tests

* chore(#2630): backfill changeset pr to 2661

docs/INVENTORY-MANIFEST.json

@@ -354,6 +354,7 @@
       "drift.cjs",
       "edge-probe.cjs",
       "embedding-adapter.cjs",
+      "estimate-cli.cjs",
       "eval-command-router.cjs",
       "eval.cjs",
       "external-descriptor-trust.cjs",
@@ -399,6 +400,7 @@
       "package-identity.cjs",
       "package-legitimacy.cjs",
       "phase-command-router.cjs",
+      "phase-estimation.cjs",
       "phase-id.cjs",
       "phase-lifecycle.cjs",
       "phase-locator.cjs",