* fix(#2770): coerce non-string truths to preserve cross-cutting constraints
`cmdRoadmapAnnotateDependencies` skipped non-string truth entries via
`if (typeof t !== 'string') continue`. That avoided the TypeError reported
in #2770 but silently dropped legitimate constraints — numeric YAML scalars
(`- 3`) and kv-shaped truths from parseMustHavesBlock's continuation-kv
path (#2757) — from the cross-cutting analysis, leaving ROADMAP.md
under-annotated.
Replace the skip-guard with a `coerceTruthToString` helper that:
* passes strings through
* `String()`-coerces numbers, booleans, bigints
* extracts a string field (title, text, name, rule, path, provides) from
object-shaped items
Composes cleanly with #2757 (objects from kv continuation lines now
contribute their title rather than being dropped) and the existing
`splitInlineArray` quote-aware parser.
Tests: tests/bug-2770-annotate-deps-int-coerce.test.cjs
- numeric scalar truth shared across plans surfaces as constraint
- kv-shaped truth surfaces via title field
- bare-int depends_on regression guards on extractFrontmatter
Full suite: 5678 pass, 0 fail.
Closes#2770
* test(#2770): use array join() for multi-line fixtures per CONTRIBUTING
* refactor(#2770): cache trim() and avoid no-op truthCounts.set in aggregation
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