feat: v0.7.0 — secrets partagés par provider : am providers set-token/token, namespace keyring providers/<nom>, résolution @secret en cascade agent → provider (closes #89)

Corrige au passage deux bugs du keyring (#36) : features natifs manquants du crate keyring (set() no-op silencieux, rien ne persistait) + index __index__ jamais purgé au remove (list fantômes).

man/am-providers.1

@@ -25,6 +25,12 @@ Register a provider, or update an existing one
 providers\-remove(1)
 Remove a provider from the registry
 .TP
+providers\-set\-token(1)
+Store the provider API token in the OS keyring (shared by every agent of this provider through the @secret cascade, issue #89)
+.TP
+providers\-token(1)
+Check whether a provider token exists (the value is never shown)
+.TP
 providers\-default(1)
 Set the default provider
 .TP

man/am-secret.1

@@ -14,7 +14,7 @@ Print help
 .SH SUBCOMMANDS
 .TP
 secret\-set(1)
-Store a secret for an agent
+Store a secret for an agent (or a provider, issue #89)
 .TP
 secret\-unset(1)
 Remove a secret