Task: ores.shell talks oresmd natively

Make ores.shell talk oresmd natively. marketdata import stores URIs; new commands manage series by URI; every command output that names market data prints the URI.

• marketdata import keeps ORE text files as an input format and stores oresmd URIs.
• New commands exist: marketdata list series (shows URIs), marketdata add series <uri>, marketdata validate <uri>; feed control by URI.
• synthetic and crm command output names market data by URI, never by ORE key.

(Implementation strategy. Written when work starts; key decisions are distilled into the parent story's * Decisions at close, but the plan itself stays — it is the historical record of what we did.)

Manual QA scenarios (scaffolded via compass add test_scenario, run through the QA Validation Runner panel) that verify this task. Link new ones here as they're created; the scenario doc itself links back via its "Verifies task" field.