Extract config structs into pkg/probodconfig

probod-bootstrap only needs the config struct definitions for
YAML marshaling but transitively pulled in ~40 heavy runtime
dependencies via pkg/probod. Move all config types and their
methods to a new pkg/probodconfig package and re-export them
from pkg/probod via type aliases for backward compatibility.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/probodconfig/pg_config.go

@@ -0,0 +1,101 @@
+// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package probodconfig
+
+import (
+	"crypto/x509"
+	"encoding/pem"
+	"time"
+
+	"go.gearno.de/kit/pg"
+)
+
+type PgConfig struct {
+	Addr                   string `json:"addr"`
+	Username               string `json:"username"`
+	Password               string `json:"password"`
+	Database               string `json:"database"`
+	PoolSize               int32  `json:"pool-size"`
+	MinPoolSize            int32  `json:"min-pool-size"`
+	MaxConnIdleTimeSeconds int    `json:"max-conn-idle-time-seconds"`
+	MaxConnLifetimeSeconds int    `json:"max-conn-lifetime-seconds"`
+	CACertBundle           string `json:"ca-cert-bundle"`
+	Debug                  bool   `json:"debug"`
+}
+
+func (cfg PgConfig) Options(options ...pg.Option) []pg.Option {
+	opts := []pg.Option{
+		pg.WithAddr(cfg.Addr),
+		pg.WithUser(cfg.Username),
+		pg.WithPassword(cfg.Password),
+		pg.WithDatabase(cfg.Database),
+		pg.WithPoolSize(cfg.PoolSize),
+	}
+
+	if cfg.MinPoolSize > 0 {
+		opts = append(opts, pg.WithMinPoolSize(cfg.MinPoolSize))
+	}
+
+	if cfg.MaxConnIdleTimeSeconds > 0 {
+		opts = append(
+			opts,
+			pg.WithMaxConnIdleTime(
+				time.Duration(cfg.MaxConnIdleTimeSeconds)*time.Second,
+			),
+		)
+	}
+
+	if cfg.MaxConnLifetimeSeconds > 0 {
+		opts = append(
+			opts,
+			pg.WithMaxConnLifetime(
+				time.Duration(cfg.MaxConnLifetimeSeconds)*time.Second,
+			),
+		)
+	}
+
+	if cfg.Debug {
+		opts = append(opts, pg.WithDebug())
+	}
+
+	if cfg.CACertBundle != "" {
+		var certs []*x509.Certificate
+		pemData := []byte(cfg.CACertBundle)
+
+		for len(pemData) > 0 {
+			var block *pem.Block
+			block, pemData = pem.Decode(pemData)
+			if block == nil {
+				break
+			}
+			if block.Type != "CERTIFICATE" {
+				continue
+			}
+
+			cert, err := x509.ParseCertificate(block.Bytes)
+			if err == nil {
+				certs = append(certs, cert)
+			}
+		}
+
+		if len(certs) > 0 {
+			opts = append(opts, pg.WithTLS(certs))
+		}
+	}
+
+	opts = append(opts, options...)
+
+	return opts
+}