[senamakel]

Reference: tinyhumansai/openhuman#7982 (part of #7973). Not a Closes: the library-only workflow store and the adaptive collections are follow-ups (see below).

What changed

• tinystoragedrivers moves to v1.0.0 in every crate (tinyflows-drivers, -adaptive, -import, -module).
• tinyflows_drivers::storage_schema() (owner flows, Tenant) and cron_storage_schema() (owner cron, Tenant) declare the v2 collections and carry the v1 -> v2 steps.
• Catalog: bare snake_case bodies, no JSON-in-strings (graph, steps, pending_approvals, drafts are real values), one _ms per instant, *_ns copies gone, ULID ids for new flows/revisions/drafts (monotonic per process), hand-written CAS helpers now Repo::update, writes declare schema: 2. Wire types (Flow, FlowRun, ...) are unchanged; times render back as RFC 3339 with millisecond precision. Caller-supplied times (an import keeps a flow's created_at) stay body fields; the driver-clock record metadata cannot carry them.
• Cron: cron.jobs (object schedule/delivery/origin/policy, a one-shot's instant is at_ms, next_run_ms only, creation time is the record's created_ms metadata), cron.runs (started_ms/finished_ms), cron.admission (the shared admission ledger; members are a list). Run numbers use tsd.counters (Counters::next("cron","runs")); occurrence claims are tsd.leases (owner cron, key Key::of([job_id, occurrence_ms]), random token as holder, lease epoch as fence). An edit, removal or re-creation of a job ends the live claim of its occurrence. The completion receipt (completed_occurrence) stays on the job document.
• Key-value: flows_kv and flows_state -> tsd.kv owner flows (DriverStateStore namespace state, catalog namespaces kv:<namespace>).
• Checkpointer: tinyflows does not depend on tinyagents, so it keeps its own checkpointer code but reads and writes exactly the graph.* documents of tinyagents-graph under namespace flows (ids Key::of([ns, thread, seq]), bodies {ns, thread, subgraph, seq, checkpoint_id, checkpoint}, graph.threads, graph.writes, schema: 4). graph.* is not declared here (owner graph declares it) and there is no flows_graph_* step (tinyagents-graph's checkpoints_flows_v2 etc. migrate it). checkpoint_layout_tests.rs pins the layout with fixtures copied from tinyagents (feat(graph,tasks): one graph checkpointer and tasks on the v2 schema tinyagents#6). The engine's Checkpointer trait has no lease methods, so no tsd.leases record is written; a host fencing a thread uses Key::of([ns, thread]) under owner graph. The payload inside checkpoint stays tinyflows' own Checkpoint shape.
• tinyflows-module: the schedule document port allows cron.*, tsd.counters, tsd.leases, and forwards schema/expires_ms on puts; a creation time is host-only, so a job imported through the module is filed at the time of the import.
• tinyflows-import tests compare at millisecond precision.

v1 -> v2 mapping

v1	v2	Step / helper
flows_definitions	flows.definitions (graph_json parsed, created_at/updated_at/last_run_at -> created_ms/updated_ms/last_run_ms, created_ns dropped)	definitions_v2
flows_revisions	flows.revisions (touched_ns -> touched_ms)	revisions_v2
flows_runs	flows.runs (steps_json/pending_approvals_json -> steps/pending_approvals, started_ms/finished_ms)	runs_v2
flows_suggestions	flows.suggestions (steps_outline, suggested_connections, suggested_slugs, created_ms)	suggestions_v2
flows_drafts	flows.drafts (draft_json unwrapped, created_ms/updated_ms)	drafts_v2
flows_kv, flows_state	tsd.kv owner flows	import_legacy_kv(storage)
flows_graph_*	graph.* ns flows	none here (tinyagents-graph)
cron_jobs	cron.jobs	jobs_v2
cron_runs	cron.runs	runs_v2
cron_counters admission	cron.admission/ledger	admission_v2
cron_counters runs	tsd.counters owner cron name runs	admission_v2 stages it as cron.admission/runs_counter; import_legacy_cron_counters(storage) moves it
embedded occurrence_lease / completed_occurrence	tsd.leases / dropped	not carried: a claim only means something to the worker holding it in memory; an occurrence in flight at upgrade may run once more

A document step cannot write tsd.* (owner tsd), hence the two importers; the host calls them once per scope after Registry::migrate. Both record completion in tsd.migrations.

Follow-ups (not in this PR)

• store::DriverWorkflowStore (wf_*, feature store): library-only, used by no host; left on v1 names.
• tinyflows-adaptive adaptive_* -> flows.adaptive_* (it would extend storage_schema(), since an owner may be declared once) and adaptive_counters -> tsd.counters.
• Documents written inside an atomic_batch (the cron job + admission + run) carry schema: 0: WriteOp has no options.

Gates

• cargo fmt --all -- --check: clean
• cargo clippy -p tinyflows-drivers -p tinyflows-import -p tinyflows-module -p tinyflows-adaptive --all-targets --all-features -- -D warnings: clean
• cargo test --workspace --all-features: all passing (drivers 345 incl. new step, importer, claim and layout tests)