[flows-tinyflows] flows: retire direct tinyflows links from core (slice 6) #8054

Close-out once every adoption leaf has landed:

• Drop tinyflows, tinyflows-catalog, tinyflows-copilot, tinyflows-drivers (and tinyflows-schedule if still declared) from crates/openhuman-core/Cargo.toml; cargo tree -p openhuman -e normal -i tinyflows is empty. tinyflows-import stays only if storage import still needs it.
• Update the flows feature and scripts/ci/check-feature-forwarding.mjs expectations.
• Update module-boundaries.json, flows/README.md, cron/README.md, modules/registry/records_flows.rs description and platform/about_app/.
• mcp/server/resources.rs reads copilot prompts — move to a bus member or the registry.

Done when: the rows above are gone from crates/openhuman-core/src/flows/ / crates/openhuman-core/src/cron/ (moved, deleted or reduced to the stated host adapter), with their tests moved alongside. Gates: cargo check (root + crates/openhuman-app), pnpm rust:layout, node scripts/ci/check-feature-forwarding.mjs, pnpm debug rust flows|cron, and the touched crates' tests. RPC namespace strings, model-facing tool names and DomainEvent variant names stay unchanged.

Agent brief

• Files to consider (paths under crates/openhuman-core/src/ unless rooted): crates/openhuman-core/Cargo.toml, flows/README.md, cron/README.md, modules/registry/records_flows.rs, mcp/server/resources.rs
• Research: cargo tree before/after; scripts/assert-shed.sh.
• Workflow: an implementing-an-epic step.
• Subagent: tdd-implementer.
• Dependencies: [flows-tinyflows] flows adopt: catalog store over the Catalog bus surface #8046, [flows-tinyflows] flows adopt: authoring, gates, approval manifest and node contracts over the bus #8047, [flows-tinyflows] flows adopt: serve capabilities as the CapsHost callback object #8048, [flows-tinyflows] flows adopt: runs over StartRun/PollRun/CancelRun with an event-bus projector #8049, [flows-tinyflows] flows adopt: resume, parked expiry and boot sweep over ResumeRun #8050, [flows-tinyflows] flows adopt: wiring warnings from tinyflows over a host ToolContractLookup #8051, [flows-tinyflows] flows adopt: copilot ProposeWorkflow/RunFlow tools and builder fallback #8052, [flows-tinyflows] cron adopt: Schedule contract v4 and retire host run-now bookkeeping #8053.

Blocked by #8046
Blocked by #8047
Blocked by #8048
Blocked by #8049
Blocked by #8050
Blocked by #8051
Blocked by #8052
Blocked by #8053
Parent: #8055