Update documentation and clients for v1.1.0

Documentation updates:
- Fix v0.1.0 → v1.1.0 version numbers in en, ru, fa, zh docs
- Add missing Window Functions, Multi-Tenant ERP, Supported Keywords sections
  to ru, fa, zh baraql.md (~105 lines each)
- Expand Turkish and Arabic baraql.md (110 → 268 lines)
- Expand Turkish and Arabic installation.md (62 → 307 lines)
- Add new Bulgarian documentation files (18 new files)

Client updates:
- Python: Full async/await rewrite with asyncio, request queueing
- Rust: Full async/await rewrite with tokio, async examples
- Nim: Update README to v1.1.0
- All clients now support async patterns consistently

docs/bg/monitoring.md

@@ -0,0 +1,202 @@
+# Мониторинг и Наблюдаемост
+
+## Health Checks
+
+### HTTP Health Endpoint
+
+```bash
+curl http://localhost:9470/health
+```
+
+Отговор:
+
+```json
+{
+  "status": "healthy",
+  "version": "1.1.0",
+  "uptime_seconds": 86400,
+  "checks": {
+    "storage": "ok",
+    "memory": "ok",
+    "connections": "ok"
+  }
+}
+```
+
+### Readiness Probe
+
+```bash
+curl http://localhost:9470/ready
+```
+
+Връща `200 OK` когато сървърът е готов да приема трафик, `503` по време на стартиране.
+
+## Метрики
+
+### Prometheus-Съвместими Метрики
+
+```bash
+curl http://localhost:9470/metrics
+```
+
+Примерен изход:
+
+```
+# HELP baradb_queries_total Общ брой изпълнени заявки
+# TYPE baradb_queries_total counter
+baradb_queries_total 152340
+
+# HELP baradb_queries_duration_seconds Хистограма на времетраене на заявки
+# TYPE baradb_queries_duration_seconds histogram
+baradb_queries_duration_seconds_bucket{le="0.001"} 45000
+baradb_queries_duration_seconds_bucket{le="0.01"} 120000
+baradb_queries_duration_seconds_bucket{le="0.1"} 148000
+
+# HELP baradb_storage_lsm_size_bytes Общ размер на LSM-Tree
+# TYPE baradb_storage_lsm_size_bytes gauge
+baradb_storage_lsm_size_bytes 2147483648
+
+# HELP baradb_cache_hit_rate Page cache hit rate
+# TYPE baradb_cache_hit_rate gauge
+baradb_cache_hit_rate 0.94
+
+# HELP baradb_active_connections Активни клиентски връзки
+# TYPE baradb_active_connections gauge
+baradb_active_connections 42
+```
+
+### JSON Метрики
+
+```bash
+curl http://localhost:9470/metrics?format=json
+```
+
+## Логване
+
+### Нива на Логване
+
+| Ниво | Описание |
+|------|----------|
+| `debug` | Детайлни вътрешни операции |
+| `info` | Нормални операции |
+| `warn` | Възстановими проблеми |
+| `error` | Грешки, изискващи внимание |
+
+### Структурирани JSON Логове
+
+```bash
+BARADB_LOG_LEVEL=info \
+BARADB_LOG_FORMAT=json \
+BARADB_LOG_FILE=/var/log/baradb/baradb.log \
+./build/baradadb
+```
+
+Примерен лог запис:
+
+```json
+{
+  "timestamp": "2025-01-15T10:30:00.123Z",
+  "level": "info",
+  "component": "server",
+  "message": "Query executed",
+  "query": "SELECT * FROM users",
+  "duration_ms": 12,
+  "client_ip": "10.0.0.15"
+}
+```
+
+### Текстов Формат
+
+```bash
+BARADB_LOG_FORMAT=text ./build/baradadb
+```
+
+## Правила за Алармиране
+
+### Prometheus AlertManager
+
+```yaml
+groups:
+  - name: baradb
+    rules:
+      - alert: BaraDBHighErrorRate
+        expr: rate(baradb_errors_total[5m]) > 0.1
+        for: 5m
+        labels:
+          severity: critical
+        annotations:
+          summary: "Висок процент грешки в BaraDB"
+
+      - alert: BaraDBLowCacheHitRate
+        expr: baradb_cache_hit_rate < 0.8
+        for: 10m
+        labels:
+          severity: warning
+        annotations:
+          summary: "Cache hit rate под 80%"
+
+      - alert: BaraDBHighConnections
+        expr: baradb_active_connections > 800
+        for: 5m
+        labels:
+          severity: warning
+        annotations:
+          summary: "Голям брой връзки към BaraDB"
+
+      - alert: BaraDBDown
+        expr: up{job="baradb"} == 0
+        for: 1m
+        labels:
+          severity: critical
+        annotations:
+          summary: "BaraDB инстанцията не работи"
+```
+
+## Разпределен Мониторинг
+
+### Клъстерни Метрики
+
+За Raft клъстери, мониторирайте:
+
+```bash
+curl http://node1:9470/metrics/cluster
+```
+
+```json
+{
+  "cluster_id": "baradb-cluster-1",
+  "nodes": [
+    {"id": "node1", "role": "leader", "health": "healthy"},
+    {"id": "node2", "role": "follower", "health": "healthy"},
+    {"id": "node3", "role": "follower", "health": "healthy"}
+  ],
+  "raft_log_index": 15420,
+  "raft_commit_index": 15420,
+  "shards": 4,
+  "replication_lag_ms": 5
+}
+```
+
+## Профилиране на Производителност
+
+### Вграден CPU Profiler
+
+```bash
+curl -X POST http://localhost:9470/debug/pprof/cpu?seconds=30 > cpu.prof
+```
+
+### Memory Profiler
+
+```bash
+curl http://localhost:9470/debug/pprof/heap > heap.prof
+```
+
+## Отстраняване на Проблеми с Метрики
+
+| Симптом | Метрика | Действие |
+|---------|--------|----------|
+| Бавни заявки | `baradb_queries_duration_seconds` | Проверете cache hit rate, добавете индекси |
+| Висока памет | `process_resident_memory_bytes` | Намалете memtable/cache размери |
+| Растящо съхранение | `baradb_storage_lsm_size_bytes` | Пуснете ръчен compaction |
+| Грешки при връзка | `baradb_active_connections` | Увеличете connection pool или добавете възли |
+| Репликационно закъснение | `baradb_replication_lag_ms` | Проверете мрежата, увеличете ресурсите |