refactor(bot)!: rename 'ai procurement' -> 'bot/' so the compose build context is committed

The bot service in docker-compose.yml builds from ./bot, but the agent code lived in 'ai procurement/' and ./bot was only a Windows junction on reza.g's machine (and was gitignored) — exactly as the team reported: 'bot/ was never committed — prod-v7's bot is un-buildable from the repo.'

- junction removed; 'ai procurement/' renamed to 'bot/' via git mv (all 41 files keep their history as pure renames)
- 'bot/' dropped from .gitignore (voice/ stays ignored — runtime voice notes; bot/.env stays ignored by bot/.gitignore)
- compose needs no change: context: ./bot and ./bot/app now resolve to committed files
- bot/INTEGRATION-REPORT.md added: full story (problem, root cause, git state, security note on the committed BALE_BOT_TOKEN / AI_API_KEY compose defaults, and usage instructions for the team)

Verified: 41 renames staged with zero secret/cache files; voice/ and bot/.env still ignored.

bot/.env.example

@@ -0,0 +1,28 @@
+# Bale Bot API — token from Bale's BotFather (required)
+PROCUREMENT_BOT_BOT_TOKEN=
+PROCUREMENT_BOT_BALE_API_BASE=https://tapi.bale.ai
+
+# ERP procurement API (in Docker: http://api:8000/api/v1)
+PROCUREMENT_BOT_API_BASE_URL=http://localhost:8000/api/v1
+PROCUREMENT_BOT_DATABASE_URL=postgresql+asyncpg://postgres:postgres@localhost:5432/procurement
+
+# LLM provider — any OpenAI-compatible endpoint (JSON-mode chat completions)
+PROCUREMENT_BOT_AI_BASE_URL=https://api.deepseek.com
+PROCUREMENT_BOT_AI_API_KEY=
+PROCUREMENT_BOT_LLM_MODEL=deepseek-flash
+
+# STT provider — must expose POST /audio/transcriptions.
+# Falls back to AI_* when unset. DeepSeek has no audio API, so voice needs
+# its own whisper-compatible provider (OpenAI, GLM, self-hosted faster-whisper…).
+PROCUREMENT_BOT_STT_BASE_URL=
+PROCUREMENT_BOT_STT_API_KEY=
+PROCUREMENT_BOT_STT_MODEL=whisper-1
+PROCUREMENT_BOT_STT_LANGUAGE=fa
+
+# Bale chat ids allowed without Casdoor linking (comma separated)
+PROCUREMENT_BOT_ADMIN_CHAT_IDS=
+# Optional bearer for the day the ERP starts enforcing auth on procurement routes
+PROCUREMENT_BOT_SERVICE_TOKEN=
+# Drafts older than this are swept into `expired`
+PROCUREMENT_BOT_DRAFT_TTL_HOURS=24
+PROCUREMENT_BOT_LOG_LEVEL=INFO