fix(#1658): make byPhaseTablePattern CRLF-tolerant on STATE.md tables (#1662)

* fix(#1658): make byPhaseTablePattern CRLF-tolerant on STATE.md tables

byPhaseTablePattern required a bare \n after the header and separator rows, so a
STATE.md with CRLF (\r\n) line endings (Windows, or hand-edited) had its By-Phase
table treated as absent: phase complete never upserted the row (and the velocity-from-
table derivation went stale). Make the header/separator terminators and the closing
lookahead CRLF-tolerant ([ \t]*\r?\n, (?=\r?\n|$)). Backward-compatible with LF.
Regression folded into tests/state.test.cjs: phase complete on a CRLF STATE.md upserts
the row and removes the placeholder. CONTRIBUTING's QA matrix lists Mixed CRLF/LF as a
required parser case.

* chore(#1658): backfill changeset pr ref to 1662

src/state.cts

@@ -263,7 +263,7 @@ function _stateLockBodyPid(lockPath: string): number | null {
 let _stateStealSeq = 0;
 
 // Hoisted to module scope — compiled once, not per call (#320). Stateless (/i, used with .match).
-const byPhaseTablePattern = /(\|\s*Phase\s*\|\s*Plans\s*\|\s*Total\s*\|\s*Avg\/Plan\s*\|[ \t]*\n\|(?:[- :\t]+\|)+[ \t]*\n)((?:[ \t]*\|[^\n]*\n)*)(?=\n|$)/i;
+const byPhaseTablePattern = /(\|\s*Phase\s*\|\s*Plans\s*\|\s*Total\s*\|\s*Avg\/Plan\s*\|[ \t]*\r?\n\|(?:[- :\t]+\|)+[ \t]*\r?\n)((?:[ \t]*\|[^\n]*\n)*)(?=\r?\n|$)/i;
 
 // ─── ADR-1372 T6: seam-based section splice helper ───────────────────────────