dat: report and raise byte coverage, type unused data by address in dat_symbols.txt

[ribbanya]

Archive byte coverage (matching samples and inferred data) goes from 86.98% to 99.80%, and complete units from 106 to 345 of 838. Sample matches are unchanged apart from the two known mismatches.

Tooling:

• samples report prints the archive bytes covered, and --missing lists the data the base doesn't infer by the field that reaches it.
• dat_symbols.txt lines are name = dat:address; like symbols.txt, with the dat in the section's place. * for the address matches a public symbol by name, as before; an address gives a C alias for data no public symbol names. Type and count are separate attributes mirroring the annotations: type:T, count:N and extent (instead of count:* and T[N]).
• DAT_SCRIPT takes a table (fighters) or a length expression in _command (itCommandLength, items); the generic commands 0-9 (Command_Execute) are shared by every script. Scripts' extents count as typed data.
• hsd.rs keeps archive tables in file order, as the game reads them, and refuses malformed archives.
• Clippy comes from the flake.

Types:

• HSD_VtxDescList::vertex is an HSD_VertexArray blob; palettes are stored rounded up to 16 entries; collision vertices, lines and joints are counted; the particle banks run as far as the data does; item state scripts are scripts; FtPartsDesc.vis_table rows are FtPartsVisLookup*; HSD_AObjDesc.obj_id is any descriptor; every effect archive's table is an EffectDataTable.

Unused data: only names, and the pointers from them, reach archive data, so data nothing points to is export leftovers. About 3,800 aliases type the joint, animation and material animation trees among it whose every part is well-formed (PlFe's and TyMcCmDs's unused models among them), with no new walk gaps or sample mismatches.

🤖 Generated with Claude Code

Dat coverage

Explained relocations: 99.21% of 1773047 (99.53% of those reachable)

Typed publics: 99.55% of 12060

Family	Archives	Publics	Typed	Relocations	Explained	Gap	Trailing	Unreferenced	Reachable
Db	1/1	1	100.00%	854	100.00%	0	0	0	100.00%
Ef	36/36	36	100.00%	16693	99.50%	0	0	83	100.00%
Gm	46/47	97	98.97%	30755	98.87%	283	65	0	98.87%
Gr	71/71	4260	98.99%	216551	97.50%	1348	820	3250	98.98%
If	7/7	18	100.00%	7184	99.93%	0	5	0	99.93%
Ir	6/6	126	100.00%	4656	99.87%	0	6	0	99.87%
It	1/1	1	100.00%	43705	97.87%	2	331	598	99.23%
Lb	6/6	12	91.67%	186	7.53%	2	170	0	7.53%
Mn	5/5	350	98.29%	33176	99.92%	2	24	0	99.92%
Nt	4/4	4	100.00%	908	98.90%	0	10	0	98.90%
Pd	1/1	1	100.00%	1	100.00%	0	0	0	100.00%
Pl	6485/6485	6623	100.00%	1306218	99.52%	532	4737	982	99.60%
Sd	15/15	15	100.00%	7332	100.00%	0	0	0	100.00%
Sm	1/1	1	100.00%	4198	100.00%	0	0	0	100.00%
Tm	0/1	3	0.00%	0	100.00%	0	0	0	100.00%
Ty	352/352	492	100.00%	95067	99.25%	9	21	687	99.97%
Vi	11/11	20	100.00%	5563	99.77%	0	13	0	99.77%
Total	7048/7050	12060	99.55%	1773047	99.21%	2178	6202	5600	99.53%