Wasm: (A) diverse internal doc updates. (B) when generating automated JS-to-WASM...

Wasm: (A) diverse internal doc updates. (B) when generating automated JS-to-WASM function proxies for converters which require an additional middle-man proxy, e.g. sqlite3_exec(), use the client-provided function, not the proxy function, as the cache key, to keep from re-generating the conversion in some common use patterns.

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