Fix USCDI clinical data templates against a working implementation

[akim1995]

Summary

Three example rows in the USCDI clinical data templates didn't satisfy the rules their own spec pages describe, so they silently failed validation when ingested by a real implementation instead of demonstrating a working delivery.

• diagnostic_reports: DR-772/DR-773 had no issued, which US Core requires once a report's status is partial/preliminary/final/amended/corrected/appended. The spec page called issued "If available", which is what let a non-conformant example through — fixed the template rows and the wording (now states the real conditional requirement, for issued and effective_datetime both).
• social_history: SH-0001's occupation row named no value_system. The spec page pointed at "ONET-SOC" with no system URI; occupation actually needs Occupational Data for Health (ODH) stated explicitly, since a bare ONET-SOC code and an ODH composite code are different code spaces. Fixed the template row and gave value_system its own table row instead of folding it into value_code's description.
• practitioners: the Fox/Dana row (a clinician with no location, org, or contact info) produced a PractitionerRole that fails Plan-Net pd-1 ("SHALL have contact information or a reference to..."). Gave it a phone number — the minimal fix that keeps it valid while still illustrating "a clinician missing from the directory".

Found while reviewing HealthSamurai/interbox-workspace-private#13 — a working pipeline correctly rejected these rows, which is what surfaced the mismatch.

Test plan

• bun lint passes (only pre-existing, unrelated warnings)
• bun assets:hash run, all references updated
• Verified against interbox-workspace-private's USCDI-clinical pipeline logic (normalize filters + mapping rules) for all three fixes

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