Whole connector pages

Select collections-v1 for 17 whole-page read variants and strict Slack topics. pageSize is a provider hint; follow opaque position.more with identical normalized inputs and detect repeated positionId. position.end, returnedCount and searchCoverage have separate meanings. Use existing source/account registration and actual identity filters to adopt the manager-local catalog adapter. Its cursor key survives reload/rollover/scoping, but not a fresh manager/process or explicit clear. Read the recipe for inventory, raw provider items, provider ceilings, query binding, Unicode validation, source recovery and setup; the capacity inventory classifies retained bounds. Legacy/execution-v1 and saved DTOs remain unchanged.