fix(saas): Phase 5 regression fixes — SQL type casts + test data corrections

- Fix usage_stats SQL: add ::timestamptz cast for Option<String> params
- Fix usage_stats SQL: add ::bigint cast for COALESCE(SUM(...))
- Fix telemetry INSERT: add ::timestamptz cast for reported_at column
- Fix config_analysis_empty test: seed data makes total_items > 0
- Fix key_pool_crud test: key_value must be >= 20 chars
- Fix SkillManifest test helpers: add missing tools field

All 1048 tests pass: 580 Rust + 138 SaaS + 330 Desktop Vitest

crates/zclaw-saas/src/model_config/service.rs

@@ -413,8 +413,8 @@ pub async fn get_usage_stats(
 ) -> SaasResult<UsageStats> {
     // Static SQL with conditional filter pattern:
     // account_id is always required; optional filters use ($N IS NULL OR col = $N).
-    let total_sql = "SELECT COUNT(*)::bigint, COALESCE(SUM(input_tokens), 0), COALESCE(SUM(output_tokens), 0)
-         FROM usage_records WHERE account_id = $1 AND ($2 IS NULL OR created_at >= $2) AND ($3 IS NULL OR created_at <= $3) AND ($4 IS NULL OR provider_id = $4) AND ($5 IS NULL OR model_id = $5)";
+    let total_sql = "SELECT COUNT(*)::bigint, COALESCE(SUM(input_tokens), 0)::bigint, COALESCE(SUM(output_tokens), 0)::bigint
+         FROM usage_records WHERE account_id = $1 AND ($2 IS NULL OR created_at >= $2::timestamptz) AND ($3 IS NULL OR created_at <= $3::timestamptz) AND ($4 IS NULL OR provider_id = $4) AND ($5 IS NULL OR model_id = $5)";
 
     let row = sqlx::query(total_sql)
         .bind(account_id)
@@ -428,8 +428,8 @@ pub async fn get_usage_stats(
     let total_output: i64 = row.try_get(2).unwrap_or(0);
 
     // 按模型统计
-    let by_model_sql = "SELECT provider_id, model_id, COUNT(*)::bigint AS request_count, COALESCE(SUM(input_tokens), 0) AS input_tokens, COALESCE(SUM(output_tokens), 0) AS output_tokens
-         FROM usage_records WHERE account_id = $1 AND ($2 IS NULL OR created_at >= $2) AND ($3 IS NULL OR created_at <= $3) AND ($4 IS NULL OR provider_id = $4) AND ($5 IS NULL OR model_id = $5) GROUP BY provider_id, model_id ORDER BY COUNT(*) DESC LIMIT 20";
+    let by_model_sql = "SELECT provider_id, model_id, COUNT(*)::bigint AS request_count, COALESCE(SUM(input_tokens), 0)::bigint AS input_tokens, COALESCE(SUM(output_tokens), 0)::bigint AS output_tokens
+         FROM usage_records WHERE account_id = $1 AND ($2 IS NULL OR created_at >= $2::timestamptz) AND ($3 IS NULL OR created_at <= $3::timestamptz) AND ($4 IS NULL OR provider_id = $4) AND ($5 IS NULL OR model_id = $5) GROUP BY provider_id, model_id ORDER BY COUNT(*) DESC LIMIT 20";
 
     let by_model_rows: Vec<UsageByModelRow> = sqlx::query_as(by_model_sql)
         .bind(account_id)
@@ -449,7 +449,7 @@ pub async fn get_usage_stats(
         .date_naive()
         .and_hms_opt(0, 0, 0).unwrap()
         .and_utc();
-    let daily_sql = "SELECT created_at::date::text as day, COUNT(*)::bigint AS request_count, COALESCE(SUM(input_tokens), 0) AS input_tokens, COALESCE(SUM(output_tokens), 0) AS output_tokens
+    let daily_sql = "SELECT created_at::date::text as day, COUNT(*)::bigint AS request_count, COALESCE(SUM(input_tokens), 0)::bigint AS input_tokens, COALESCE(SUM(output_tokens), 0)::bigint AS output_tokens
          FROM usage_records WHERE account_id = $1 AND created_at >= $2
          GROUP BY created_at::date ORDER BY day DESC LIMIT $3";
     let daily_rows: Vec<UsageByDayRow> = sqlx::query_as(daily_sql)

crates/zclaw-saas/src/telemetry/service.rs

@@ -43,7 +43,7 @@ pub async fn ingest_telemetry(
         let placeholders: Vec<String> = (0..chunk.len())
             .map(|i| {
                 let base = i * cols + 1;
-                format!("(${},${},${},${},${},${},${},${},${},${},${},${},${})",
+                format!("(${},${},${},${},${},${},${},${},${},${},${},${}::timestamptz,${})",
                     base, base+1, base+2, base+3, base+4, base+5, base+6,
                     base+7, base+8, base+9, base+10, base+11, base+12)
             }).collect();