docs(adr): renumber the file-based chunk store ADR to 0014

ADR-0012 is already taken. `origin/main` carries
`ADR-0012-unresolved-verification-retry-backoff.md` from a PR that merged after this branch
was cut, so this branch does not contain it and nothing here noticed: the governance check
looks for duplicate numbers among the files in the branch, sees one file per number, and
passes. The duplicate only exists once the two are merged together, at which point main
carries two different decisions wearing one number.

0013 is taken as well, by the settlement-version ADR on another open branch, so the next
free number is 0014. Numbers are claimed on merge order and nothing reserves them, so this
was checked against main and against every open pull request rather than against main
alone.

Author: grumbach

…based-chunk-store-and-lmdb-retirement.md …based-chunk-store-and-lmdb-retirement.mddocs/adr/ADR-0012-file-based-chunk-store-and-lmdb-retirement.md renamed to docs/adr/ADR-0014-file-based-chunk-store-and-lmdb-retirement.md docs/adr/ADR-0012-file-based-chunk-store-and-lmdb-retirement.md renamed to docs/adr/ADR-0014-file-based-chunk-store-and-lmdb-retirement.md

@@ -1,4 +1,4 @@
-# ADR-0012: One File Per Chunk, and Retiring LMDB Without Losing Data
+# ADR-0014: One File Per Chunk, and Retiring LMDB Without Losing Data
 
 - **Status:** Proposed
 - **Date:** 2026-08-25