session-memory Phase 2: evidence-bar + bloat guard (T04)

gating.py: two-tier evidence bar (OQ5) — promote floor (frequency/sessions/
cost_impact) plus a stricter distribution-eligibility floor that sets a
promoted pattern to approved+distribution_ready vs provisional. Wired into
review() so thin approvals land provisional. bloat_warnings flags duplicate
and near-duplicate (same signal-type+locus) candidates (OQ6). [curate]/
[curate.gate] knobs in config.toml. 6 new tests; suite 64/64 green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

session_memory/config.toml

@@ -31,6 +31,21 @@ enabled = true
 root    = "~/.grok/sessions"
 glob    = "*/*/chat_history.jsonl"
 
+# Curate phase (AGENTIC-WP-0004): catalog location + promotion evidence bar.
+[curate]
+catalog_dir = "session_memory/catalog"               # files-first Pattern Catalog (committed)
+review_log  = "session_memory/.store/reviews.jsonl"  # remembered decisions (gitignored)
+
+# Evidence bar (OQ5): floors to promote at all, and stricter floors to be
+# distribution-eligible (status=approved, distribution_ready=true).
+[curate.gate]
+min_frequency             = 2      # >= this many supporting signals to promote
+min_sessions              = 2      # >= this many distinct sessions
+min_cost_impact           = 0.0
+dist_require_cross_flavor = false  # require cross-flavor evidence to distribute
+dist_min_frequency        = 3
+dist_min_cost_impact      = 0.0
+
 # cwd basename -> domain slug. Used to tag sessions with their Custodian domain.
 [repo_domain_map]
 agentic-resources = "helix_forge"