add db connection - INCOMPLETE

- remove containers after running
- change log paths to make more sense (more hierarchical)
- add dependency funcs (e.g. dependency_map())
- add postgres connection

docs/database.md

@@ -0,0 +1,31 @@
+# Database docs
+
+Gregory's database is described as follows:
+
+```sql
+CREATE TABLE IF NOT EXISTS job_logs (
+    start_time   timestamp,
+    end_time    timestamp,
+    duration    interval GENERATED ALWAYS AS (end_time - start_time) STORED,
+    exit_code    smallint,
+    job_id     text,
+    revision    text,
+    uuid      text,
+    container_name  text GENERATED ALWAYS AS (job_id || '-' || uuid) STORED,
+    log_path        text
+);
+```
+
+i.e. it uses the table `job_logs`, containing the following fields:
+
+| start_time | end_time | duration | exit_code | job_id | revision | uuid | container_name | log_path |
+| ---------- | -------- | -------- | --------- | ------ | -------- | ---- | -------------- | -------- |
+
+---
+
+`duration` and `container_name` don't have to be inserted, as the database generates them, so they're just inserted like this:
+
+```rs
+INSERT INTO job_logs (start_time, end_time, exit_code, job_id, revision, uuid, log_path)
+    VALUES ('1970-01-01 10:10:10 idkkkkk', '1970-01-01 10:11:10 idkkkkk', 1, 'packaging.librewolf.compilation', '5', 'blahblahblahblah', './data/logs/packages.librewolf.compilation/5/blahblahblahblah');
+```