fix(migration): quote table names in create_hypertable calls

[TerrifiedBug]

Summary

Migration `20260329000000_timescaledb_hypertables` calls `create_hypertable('PipelineMetric', ...)` (and the same pattern for `NodeMetric`, `PipelineLog`, `NodeStatusEvent`). PostgreSQL parses the first argument as a `regclass`, and `regclass` input folds unquoted identifiers to lowercase. So the lookup becomes `pipelinemetric`, which doesn't exist — Prisma created the table as case-preserved `"PipelineMetric"`.

Symptom on a TimescaleDB-enabled database (e.g. the new hosted demo on `timescale/timescaledb:2.16.0-pg16`):

```
ERROR: relation "pipelinemetric" does not exist
PL/pgSQL function inline_code_block line 17 at PERFORM
```

Fix: embed the case-preserved identifier inside the regclass string literal — `'PipelineMetric'` → `'"PipelineMetric"'` — for all four tables.

Why this didn't surface earlier

The whole block sits under `IF EXISTS (SELECT 1 FROM pg_extension WHERE extname = 'timescaledb')`, so plain-Postgres deployments silently no-op'd this migration. The demo environment is the first one in the wild to actually have the `timescaledb` extension, which is why we're only seeing it now.

Recovery instructions

For anyone whose DB is currently in the failed state (only TimescaleDB users; plain-Postgres users are unaffected):

Option A — wipe and reapply (cleanest if no real data):
```sh
docker compose down -v
docker compose up
```

Option B — preserve data:
```sh

Mark the failed migration as rolled back

npx prisma migrate resolve --rolled-back 20260329000000_timescaledb_hypertables

Apply the corrected migration

npx prisma migrate deploy
```

Drift warning for plain-Postgres users

The migration's checksum changes. On next `prisma migrate deploy` you may see a "migration was modified after applied" warning. Resolve with:

```sh
npx prisma migrate resolve --applied 20260329000000_timescaledb_hypertables
```

This is a one-time fix; the no-op effect on plain Postgres is unchanged.

Test plan

• Visual inspection of the four `PERFORM create_hypertable` calls — every table-name argument is now wrapped in escaped quotes
• Pull this branch into the demo deployment, wipe the postgres volume, restart — migrations apply cleanly through to the end
• Verify hypertables exist: `SELECT hypertable_name FROM timescaledb_information.hypertables;` — should show all four

References

• PostgreSQL docs on regclass case-folding: https://www.postgresql.org/docs/current/datatype-oid.html
• TimescaleDB `create_hypertable` reference: https://docs.timescale.com/api/latest/hypertable/create_hypertable/

[greptile-apps]

Greptile Summary

This PR fixes a PostgreSQL regclass case-folding bug in the TimescaleDB migration: passing 'PipelineMetric' (unquoted inside the string) caused the identifier to be folded to lowercase and fail with "relation does not exist". The fix — wrapping each table name in embedded double-quotes ('"PipelineMetric"') — is applied correctly and consistently to all four hypertable calls, the explanatory comment is accurate, and the IF EXISTS (timescaledb) guard continues to make the migration a no-op on plain-Postgres deployments.

Confidence Score: 5/5

Safe to merge — targeted one-line fix per table with no side effects on plain-Postgres deployments.

The change is minimal and correct: all four create_hypertable calls receive the properly quoted regclass string, the if_not_exists => true flag keeps the migration idempotent, and the TimescaleDB guard ensures plain-Postgres environments are unaffected. No logic, security, or data-integrity concerns were found.

No files require special attention.

Important Files Changed

Filename	Overview
prisma/migrations/20260329000000_timescaledb_hypertables/migration.sql	Adds embedded double-quotes to all four create_hypertable() regclass arguments to preserve case; fix is applied consistently and a clear explanatory comment is added.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[prisma migrate deploy] --> B{TimescaleDB\nextension present?}
    B -- No --> C[RAISE NOTICE: skipping\n plain-Postgres no-op]
    B -- Yes --> D[DROP + recreate composite PKs\nid + timestamp]
    D --> E["create_hypertable('PipelineMetric', ...)"]
    E --> F["create_hypertable('NodeMetric', ...)"]
    F --> G["create_hypertable('PipelineLog', ...)"]
    G --> H["create_hypertable('NodeStatusEvent', ...)"]
    H --> I[RAISE NOTICE: hypertables created]

    style E fill:#d4edda,stroke:#28a745
    style F fill:#d4edda,stroke:#28a745
    style G fill:#d4edda,stroke:#28a745
    style H fill:#d4edda,stroke:#28a745

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_{Reviews (1): Last reviewed commit: "fix(migration): quote table names passed..." | Re-trigger Greptile}