docs(execution): define context module semantics

[NathanFlurry]

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[NathanFlurry]

Stack for rivet-dev/agentos

• #1950 fix(execution): allow uncloneable module exports
• #1951 docs(execution): document inline ESM support
• #1954 test(core): cover Secure Exec resident sources
• #1952 feat(execution): support JavaScript data URL modules
• #1955 test(execution): keep inline module calls independently eval …
• #1956 test(execution): cover context top-level await
• #1953 docs(execution): define context module semantics 👈
• #1949 fix(execution): honor inline JavaScript module format
• main

Get stack: forklift get 1953
Push local edits: forklift submit
Merge when ready: forklift merge 1953

_{change soypllku}