revert(proxy): drop the 1-hour cache TTL option and TTL-bucketed write accounting

The forced 1-hour cache_control TTL (schema v14) was a mistake. Injected
breakpoints return to Anthropic's standard 5-minute TTL, caller-owned
markers are preserved verbatim instead of having their TTLs rewritten,
and the 5m/1h cache-write buckets are removed from usage parsing and
pricing (back to the single aggregate cache-creation rate). The cache
TTL selector is removed from the rectifier settings panel along with its
i18n keys in all four locales.

SCHEMA_VERSION returns to 13: the unreleased cache_creation_1h_tokens
column and the v13->v14 migration are removed. The feature never shipped
in a release and the introducing commit was never pushed, so no
databases were stamped v14 outside this machine (local DB verified at
user_version 13).

src-tauri/src/proxy/forwarder.rs

@@ -2859,13 +2859,13 @@ fn responses_error_envelope_message(body: &[u8]) -> Option<String> {
 /// Prompt caching is part of the Codex→Anthropic protocol bridge rather than an
 /// optional Bedrock optimizer. Codex requests do not contain Anthropic
 /// `cache_control`, so keep bridge caching on by default while still honoring the
-/// dedicated cache-injection switch and configured TTL.
+/// dedicated cache-injection switch. Injected breakpoints always use Anthropic's
+/// standard 5-minute TTL.
 fn codex_anthropic_cache_config(config: &OptimizerConfig) -> OptimizerConfig {
     OptimizerConfig {
         enabled: true,
         thinking_optimizer: false,
         cache_injection: config.cache_injection,
-        cache_ttl: config.cache_ttl.clone(),
     }
 }
 
@@ -4233,7 +4233,6 @@ mod tests {
         let default = codex_anthropic_cache_config(&OptimizerConfig::default());
         assert!(default.enabled);
         assert!(default.cache_injection);
-        assert_eq!(default.cache_ttl, "1h");
 
         let disabled = codex_anthropic_cache_config(&OptimizerConfig {
             cache_injection: false,