Fix CHANGELOG API names to match implementation

Address P2: replace nonexistent logit_strict/diagnose_propensity on results
with actual API: epv_threshold, epv_summary()/epv_diagnostics on results,
diagnose_propensity() pre-estimation helper on CS only.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: igerber

CHANGELOG.md

@@ -11,9 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 - **EPV diagnostics for propensity score logit** — events-per-variable (EPV) checks with Peduzzi convention (predictors excluding intercept) for CallawaySantAnna IPW/DR, TripleDifference IPW/DR, and StaggeredTripleDifference
-- `diagnose_propensity()` method on CS/TripleDiff/StaggeredDDD results for post-fit propensity score assessment
+- `epv_summary()` / `epv_diagnostics` on post-fit results for CallawaySantAnna, TripleDifference, and StaggeredTripleDifference
+- `diagnose_propensity()` pre-estimation helper on CallawaySantAnna
 - EPV summary block in TripleDifference `summary()` output
-- `logit_strict` parameter for propensity score estimation — warns on low EPV (default) or raises error (`strict=True`)
+- `epv_threshold` parameter for propensity score estimation — warns on low EPV (default) or escalates via `rank_deficient_action="error"`
 
 ### Changed
 - Default propensity score fallback behavior: safer defaults with method-specific warning messages