docs(stdlib+alib-roadmap): fill in Tracking sections with live umbrella links

Both sibling roadmap docs carried the same stale
'(TBD — opened alongside this PR)' placeholders for umbrella tracker
and per-tier/track child issues. Those umbrellas now exist, so the
placeholders were stale per each doc's 'do not let the table drift'
rule:

- stdlib-roadmap.adoc -> umbrella #412; lazy child model (stdlib #N);
  filed so far: #415 (stdlib #5, cross-file use; closed)
- alib-roadmap.adoc   -> umbrella #413; lazy child model (alib #N);
  filed so far: #416 (alib #10, alib.affine module; closed)

Reflects each campaign's actual lazy child-issue model (open issues as
work starts; do not seed all up front), distinct from the newer
bindings campaign (#446) which pre-files per-tier issues.

Author: claude

docs/alib-roadmap.adoc

@@ -304,10 +304,17 @@ extensions that aLib doesn't currently capture. These items propose
 
 == Tracking
 
-* Umbrella tracker: (TBD — opened alongside this PR)
-* Per-tier child issues: (TBD — opened alongside this PR)
+* Umbrella tracker:
+  link:https://github.com/hyperpolymath/affinescript/issues/413[#413]
+  (Umbrella: aLib conformance and contributions roadmap — 25 items /
+  3 tracks).
+* Per-track child issues: opened lazily as work on an item starts.
+  Reference items by their stable doc number as `alib #N` in
+  cross-issue discussion. Filed so far:
+** link:https://github.com/hyperpolymath/affinescript/issues/416[#416]
+   — alib #10 (`stdlib/alib.affine` conformance module); closed.
 * Upstream tracking: `hyperpolymath/aggregate-library` (T3 items
-  result in PRs there, not in this repo)
+  result in PRs there, not in this repo).
 
 When an item's status changes, update its row in this file in the
 *same* PR that lands the change; do not let the table drift.

docs/stdlib-roadmap.adoc

@@ -481,8 +481,15 @@ Items that earn their place once the basics are solid.
 
 == Tracking
 
-* Umbrella tracker: (TBD — opened alongside this PR)
-* Per-tier child issues: (TBD — opened alongside this PR)
+* Umbrella tracker:
+  link:https://github.com/hyperpolymath/affinescript/issues/412[#412]
+  (Umbrella: standard library roadmap — 50 items / 5 tiers).
+* Per-tier child issues: opened lazily as work on an item starts — the
+  umbrella does not seed all 50 up front. Reference items by their
+  stable doc number as `stdlib #N` in cross-issue discussion. Filed so
+  far:
+** link:https://github.com/hyperpolymath/affinescript/issues/415[#415]
+   — stdlib #5 (cross-file `use` resolvability); closed.
 
 When a stdlib item's status changes, update its row in this file in
 the *same* PR that lands the change; do not let the table drift.