schema: validate against new TFE field spec

- add exemplaire_baiu, exemplaire_erg, cc4r, remarks;
- add is_ulb to jury;
- split jury_lecteurs into interne/externe in view;
- refactor admin edit form with backoffice fields;
- update public fiche to show promoteur ULB and split lecteurs

app/migrations/applied/009_admin_audit_log.sql

@@ -0,0 +1,18 @@
+-- Migration 009: create admin_audit_log table
+-- Mirrors every admin action logged to /var/log/xamxam.log.
+-- Best-effort: application never fails if this table is absent, but the
+-- table must exist for AdminLogger::insertDb() to write audit records.
+CREATE TABLE IF NOT EXISTS admin_audit_log (
+    id         INTEGER  PRIMARY KEY AUTOINCREMENT,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    ip         TEXT     NOT NULL,
+    user_agent TEXT,
+    resource   TEXT     NOT NULL,
+    action     TEXT     NOT NULL,
+    status     TEXT     NOT NULL,
+    context    TEXT
+);
+
+CREATE INDEX IF NOT EXISTS idx_admin_audit_log_created_at ON admin_audit_log(created_at);
+CREATE INDEX IF NOT EXISTS idx_admin_audit_log_resource   ON admin_audit_log(resource);
+CREATE INDEX IF NOT EXISTS idx_admin_audit_log_action     ON admin_audit_log(action);