* Dynamic blocks: index kept objects once per listing and copy each value record once
Listing blocks rebuilt a handle index of every kept foreign object for each
block with an extension dictionary, multiplying the block count by the object
count. The listing now builds one ObjectIndex and asks is_dynamic_block_in per
block; dynamic_block answers None before indexing when the block has no
extension dictionary.
templates() copied a value record's tags once per dictionary key, so a record
listed under many keys was copied many times, and it looked up each
dictionary entry by scanning every object. It now resolves entries through
its handle index and copies each record at most once (CWE-400, CWE-407).
* Dynamic blocks: list a block as dynamic from its graph object without walking the graph's members
* Build: line tables only in dev, no debug info for dependencies
* Tests: one integration-test binary per crate
Each crate's tests/*.rs becomes a module of tests/it/main.rs. Files that
install process-wide state (the file io hooks, user aliases, SAVETIME and
SAVEFILEPATH, user linetype and pattern files, registered fonts) stay their
own test binaries.
* xtask ci: nextest, tests without examples, one wasm check call