srrdb: harvest the srrDB search API into a separate SQLite database

New scope reading the API instead of scraping HTML: one search path per run,
passed raw through --single-uri, and the answer stored as-is into its own
SQLite file created from the embedded schema.

Command line: --single-uri carries the path after /v1/search/
(category:flac/date:today/page:1) and must name a category; --sleep sets the
pause between pages, with the config value as fallback. A day named on the
command line is always fetched again and its dump rewritten, so cron can
refresh today hourly and yesterday daily.

Date placeholders: date:auto walks backwards to the newest day in
[srrdb.floor..yesterday] that has no dump yet, closing holes instead of
declaring the archive covered. date:today, date:yesterday and date:tomorrow
stand for the neighbouring days. Today is never taken by the walk, because a
day still being filled would be frozen by its own dump after the first run.

Dumps are the cursor as well as the record, so a missing dump directory is an
error instead of "nothing harvested yet": a renamed, unmounted or mistyped
directory must not send the run silently back to the beginning. An empty day is
a normal result and is remembered as harvested; API warnings never are, and
they reach the exit code.

Writes go through one transaction, so a day lands completely or not at all.
group and category come from the release line and the search path; status, nfo,
content and synced_at stay NULL. srrdb.log.jsonl records one line per finished
run, srrdb.error_log.jsonl keeps failures and API warnings apart by a kind
field.

Also: the console command contract returns (string, error), so a failing scope
reaches the process exit code and cron can tell a failed run from a successful
one. config/scope/srrdb.yaml is untracked because its paths differ per host.
modernc.org/sqlite replaces the archived libsql client, which only ever talked
to a server. pkg/repository/srrdb.go is split by responsibility and covered by
table-driven tests.

pkg/service/service.go

@@ -10,6 +10,7 @@ type Service struct {
 	_interface.Prescene
 	_interface.Info
 	_interface.ShareTheBrutality
+	_interface.Srrdb
 }
 
 func New(repos *repository.Repository) *Service {
@@ -18,5 +19,6 @@ func New(repos *repository.Repository) *Service {
 		Prescene:          NewPresceneService(repos.Prescene),
 		Info:              NewInfoService(),
 		ShareTheBrutality: NewShareTheBrutalityService(repos.ShareTheBrutality),
+		Srrdb:             NewSrrdbService(repos.Srrdb),
 	}
 }

pkg/service/srrdb.go

@@ -0,0 +1,17 @@
+package service
+
+import (
+	"git.kplus.net.ua/yevhen/resource-scraper/types/interface"
+)
+
+type SrrdbService struct {
+	repo _interface.Srrdb
+}
+
+func NewSrrdbService(repo _interface.Srrdb) *SrrdbService {
+	return &SrrdbService{repo: repo}
+}
+
+func (s *SrrdbService) Search(uri string) (int, error) {
+	return s.repo.Search(uri)
+}