Revert Cursor Cloud AGENTS.md docs from kaushik-IDE (#18) (#20)

<!-- CURSOR_AGENT_PR_BODY_BEGIN -->
## Summary

Reverts merge commit `b204386` (#18) from `kaushik-IDE`.

The Cursor Cloud `AGENTS.md` documentation is being relocated onto
**main** via #19. This PR
removes the duplicate section from Kaushik's branch so it no longer
carries Cloud-env docs that belong on `main`.

## Changes

- `AGENTS.md`: remove `## Cursor Cloud specific instructions` (62 lines)
— revert of #18

No application code changes.
<!-- CURSOR_AGENT_PR_BODY_END -->

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Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: venkateshsakamuri-lab

AGENTS.md

@@ -180,65 +180,3 @@ model work without CORS or cookie special-casing.
 - Database provider anti-pattern → never use if/else for database types
 - Connection pool pollution → always reset session state after benchmark operations
 - Frontend state → use Zustand selector hooks to avoid infinite re-render loops
-
-## Cursor Cloud specific instructions
-
-The dev environment runs the stack **natively (no Docker)**: Java 25 + Maven wrapper backend,
-Vite frontend, and locally-installed PostgreSQL 16 + Redis. System dependencies (JDK 25,
-Postgres, pgvector, Redis) are baked into the VM snapshot; the startup update script only
-refreshes `npm install`. Standard commands live in [`CLAUDE.md`](CLAUDE.md) — this section
-only covers cloud-specific, non-obvious caveats.
-
-### Services (start these each session — systemd is NOT running in the VM)
-
-- **PostgreSQL 16** (vault DB, port 5432): start with `sudo pg_ctlcluster 16 main start`.
-  DB `dba_agent` (user/pass `postgres`/`postgres`), extensions `vector` + `pg_stat_statements`
-  enabled. `shared_preload_libraries=pg_stat_statements` is already set in the cluster config.
-- **Redis** (cache, port 6379): start with `sudo redis-server /etc/redis/redis.conf --daemonize yes`.
-  Redis degrades gracefully but the local `.env` points at it.
-- **Backend** (port 8080, base path `/api`): `bash scripts/start-backend.sh` (wraps
-  `./mvnw spring-boot:run`; it strips `SPRING_PROFILES_ACTIVE=prod` for local runs → dev mode).
-- **Frontend** (port 3000): `npm run dev` (Vite proxies `/api` → 8080 and `/agent-api` → 8787).
-- **Hermes Agent webui** (port 8787, optional): needed only for the sidebar **Agent** tab.
-  See caveats below for install + `HERMES_WEBUI_ALLOWED_ORIGINS`.
-- A demo target DB `demo_shop` (same Postgres server, sample `customers`/`products`/`orders`)
-  exists for exercising connection/schema features without an external database.
-
-### Non-obvious setup caveats (each cost real debugging time)
-
-- **Java 25 is mandatory** (`pom.xml` sets `java.version=25`); the VM's default `java` is set
-  to Temurin 25 via `update-alternatives`, and `JAVA_HOME` is exported in `~/.bashrc`.
-- **`.env` is loaded by `source` in `scripts/start-backend.sh`, which runs under `set -e`.**
-  Dotted keys like `spring.data.redis.host=...` make bash abort the whole script with
-  "command not found". Use Spring relaxed-binding UPPERCASE env names instead
-  (e.g. `SPRING_DATA_REDIS_HOST`). This is why the local `.env` avoids dotted keys.
-- **`ENCRYPTION_KEYS` must be set, not just `ENCRYPTION_KEY`.** `application.properties`
-  hardcodes `ENCRYPTION_KEYS=${ENCRYPTION_KEYS:}`; with the OS env var unset this is a
-  circular placeholder reference that fails `EncryptionService` bean creation at boot. The
-  local `.env` sets `ENCRYPTION_KEYS=<id>:<base64key>` matching `ENCRYPTION_KEY_ID`.
-- **`SECURITY_AUTH_ENABLED=false`** (set in `.env`) enables the dev auto-admin bypass, so the
-  web UI needs no login. Auth defaults to ON in every profile otherwise (there is no
-  `admin/admin`); a real login needs the localhost admin-bootstrap flow (see README).
-- **The `scheduled_tasks` table and the `vector`/`pg_stat_statements` extensions** come from
-  `docker/postgres/init/*.sql`. In the native (non-Docker) setup those were applied by hand;
-  they persist in the snapshot. If you ever recreate the vault DB, re-apply
-  `docker/postgres/init/*.sql` or db-scheduler logs `relation "scheduled_tasks" does not exist`.
-- **LLM (Azure OpenAI) is configured in the local gitignored `.env`** (not committed). Working
-  values for this environment: `DEEPSQL_CHAT_PROVIDER=openai`,
-  `DEEPSQL_CHAT_ENDPOINT=https://deepsql-selfhost-resource.cognitiveservices.azure.com/`,
-  `DEEPSQL_CHAT_MODEL=gpt-5.4` (deployment name), plus matching `DEEPSQL_EMBEDDING_*` with
-  `text-embedding-3-large`. Also set `AZURE_OPENAI_KEY` / `AZURE_OPENAI_ENDPOINT` aliases —
-  `hermes/install.sh` reads those. After changing LLM env, restart the backend
-  (`scripts/start-backend.sh`); `/api/setup/status` should show `hasLlmConfig: true`.
-- **Agent tab (Hermes) is optional but required for the in-app Agent chat UI.** Install via
-  `curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash -s -- --non-interactive --skip-setup`,
-  symlink `~/.hermes/hermes-agent/.venv` → `venv` (DeepSQL's `hermes/install.sh` expects `.venv`),
-  then `bash hermes/install.sh`. Start the webui with
-  `HERMES_WEBUI_ALLOWED_ORIGINS=http://localhost:3000,http://127.0.0.1:3000`
-  (without this, Vite's Origin header makes Hermes return **403** "Cross-origin mismatch").
-  Webui listens on `:8787`; Vite proxies `/agent-api` → there.
-- **Before running backend tests that boot the Spring context** (e.g. `ApiSmokeTest`), stop
-  the running backend first — both use `ddl-auto=update` on the same `dba_agent` DB and can
-  deadlock on an `ALTER TABLE`. Test env vars are documented in `CLAUDE.md` (Testing).
-- `npm run lint` currently reports many pre-existing warnings/errors in the repo; that is the
-  baseline, not a setup failure.