libpackages.toml: consume lib tier r2 (gated tcllib + repairs manifest)

All five declared artifact pins bumped r1 -> r2 - the deliberate consumer-side
half of the 2026-08-08 publish (punkbin b5b5149): tcllib2.0-tcl8/tcl9-r2,
tcllibc-tcl8/tcl9-r2 (win32), tcllibc-tcl9-r2 (linux). Header comment updated
to name the r2 vintage (pkgindex_gate-repaired trees shipping
punkbin-upstream-repairs.toml, upstream tkt 523f7e0556). Verified live:
user-run canonical libfetch materialized the r2 trees into bin/packages with
the manifest present and rest indexed at 1.8.

Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com

src/runtime/libpackages.toml

@@ -20,9 +20,11 @@
 #   target  - lib-tier subfolder: 'allplatforms' (platform-neutral, pure-tcl)
 #             or a canonical platform-dir name (binary packages)
 #
-# The r1 artifacts below are emitted by the suite_tcl90/suite_tcl86
+# The r2 artifacts below are emitted by the suite_tcl90/suite_tcl86
 # 'library-artifacts' steps and published in the canonical punkbin lib tier
-# (G-138 + G-139, both achieved 2026-07-30). Publication of any NEW revision
+# (r2 published 2026-08-08: pkgindex_gate-repaired trees shipping
+# punkbin-upstream-repairs.toml, upstream tcllib tkt 523f7e0556; r1
+# 2026-07-30 - G-138 + G-139). Publication of any NEW revision
 # remains a deliberate user step - a declared name not yet on the server
 # reports as missing from its sha1sums; a local mirror (file:// origin +
 # -trust-server) or a pre-populated bin/packages tier serves during
@@ -38,24 +40,24 @@
 # goals/archive/G-139-punkbin-library-consumption.md.
 
 [artifact.tcllib-tcl9]
-name = "tcllib2.0-tcl9-r1.zip"
+name = "tcllib2.0-tcl9-r2.zip"
 target = "allplatforms"
 
 [artifact.tcllibc-tcl9]
-name = "tcllibc-tcl9-r1.zip"
+name = "tcllibc-tcl9-r2.zip"
 target = "win32-x86_64"
 
 # G-140: the linux-x86_64 cross-built accelerators (suite_tcl90 tcllibc-linux
 # lane) consumed by punk9linux.vfs. Same immutable name in its own target
 # folder; the generation+revision grammar keys the entry name instead.
 [artifact.tcllibc-tcl9-linux]
-name = "tcllibc-tcl9-r1.zip"
+name = "tcllibc-tcl9-r2.zip"
 target = "linux-x86_64"
 
 [artifact.tcllib-tcl8]
-name = "tcllib2.0-tcl8-r1.zip"
+name = "tcllib2.0-tcl8-r2.zip"
 target = "allplatforms"
 
 [artifact.tcllibc-tcl8]
-name = "tcllibc-tcl8-r1.zip"
+name = "tcllibc-tcl8-r2.zip"
 target = "win32-x86_64"