docs(devlog): post-2.49 reconciliation — 101 units to _fin + scope-cleanup records

devlog/_fin/260813_bun_canary_dogfood/090_terminal.md

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+# terminal outcome — abandoned
+
+ABANDONED: superseded. The canary channel was retired (`27764f342`); the runtime moved to stable Bun 1.4.x. No dogfood work landed.

devlog/_fin/260814_bug_resolution_campaign/090_terminal.md

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+# terminal outcome — abandoned
+
+ABANDONED: superseded. The six-wave campaign was never executed; later 260819/260821 merge trains covered the backlog in a different shape.

devlog/_fin/260814_usage_memory_roadmap/090_terminal.md

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+# terminal outcome — abandoned
+
+ABANDONED: superseded. The M0/U1-U3 stack PRs (#1693/#1696/#1698) closed unmerged; later usage work (#2396, #1864) took a different shape.

devlog/_fin/260822_260822-bun14-followup-memory/090_terminal.md

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+# terminal outcome — abandoned
+
+ABANDONED: superseded. Measurement protocol never executed; the runtime moved to stable Bun 1.4.x (`27764f342`) making the GC/smol comparison stale.