fix: drive monitor file state tracking

migrations/6.3.1-01-drive-files/up.sql

@@ -0,0 +1,57 @@
+-- ============================================
+-- Drive Files State Table
+-- Version: 6.3.1
+-- ============================================
+-- Unifies file state tracking from JSON file to database
+-- Used by DriveMonitor to track file changes across all file types
+
+CREATE TABLE IF NOT EXISTS drive_files (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    bot_id UUID NOT NULL REFERENCES bots(id) ON DELETE CASCADE,
+    file_path TEXT NOT NULL,
+    file_type VARCHAR(20) NOT NULL, -- 'gbdialog', 'gbot', 'gbkb', etc.
+    etag TEXT,
+    last_modified TIMESTAMPTZ,
+    file_size BIGINT,
+    indexed BOOLEAN NOT NULL DEFAULT FALSE,
+    fail_count INT NOT NULL DEFAULT 0,
+    last_failed_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    UNIQUE(bot_id, file_path)
+);
+
+-- Indexes for efficient lookups
+CREATE INDEX IF NOT EXISTS idx_drive_files_bot ON drive_files(bot_id);
+CREATE INDEX IF NOT EXISTS idx_drive_files_type ON drive_files(bot_id, file_type);
+CREATE INDEX IF NOT EXISTS idx_drive_files_indexed ON drive_files(bot_id, indexed) WHERE NOT indexed;
+CREATE INDEX IF NOT EXISTS idx_drive_files_fail ON drive_files(bot_id, fail_count) WHERE fail_count > 0;
+
+-- Migrate existing kb_documents state to drive_files
+-- This preserves fail_count and last_failed_at from kb_documents
+INSERT INTO drive_files (
+    bot_id,
+    file_path,
+    file_type,
+    etag,
+    last_modified,
+    indexed,
+    fail_count,
+    last_failed_at
+)
+SELECT 
+    bot_id,
+    file_path,
+    'gbkb' as file_type,
+    file_hash as etag,
+    last_modified_at as last_modified,
+    indexed_at IS NOT NULL as indexed,
+    fail_count,
+    last_failed_at
+FROM kb_documents
+ON CONFLICT (bot_id, file_path) DO UPDATE SET
+    etag = EXCLUDED.etag,
+    last_modified = EXCLUDED.last_modified,
+    indexed = EXCLUDED.indexed,
+    fail_count = EXCLUDED.fail_count,
+    last_failed_at = EXCLUDED.last_failed_at;

src/drive/drive_monitor/mod.rs

@@ -470,7 +470,7 @@ match result {
           } else if max_fail_count >= 1 {
             300
           } else {
-            30
+            60
           };
 
           if base_sleep > 10 {