feedkit: ergonomics pass (shared logger, route compiler, param helpers)

- Add logging.Logf as the canonical printf-style logger type used across feedkit.
  - Update scheduler and dispatch to alias their Logger types to logging.Logf.
  - Eliminates type-mismatch friction when wiring one log function through the system.

- Add dispatch.CompileRoutes(*config.Config) ([]dispatch.Route, error)
  - Compiles config routes into dispatch routes with event.ParseKind normalization.
  - If routes: is omitted, defaults to “all sinks receive all kinds”.

- Expand config param helpers for both SourceConfig and SinkConfig
  - Add ParamBool/ParamInt/ParamDuration/ParamStringSlice (+ Default variants).
  - Supports common YAML-decoded types (bool/int/float/string, []any, etc.)
  - Keeps driver code cleaner and reduces repeated type assertions.

- Fix Postgres sink validation error prefix ("postgres sink", not "rabbitmq sink").

scheduler/scheduler.go

@@ -8,9 +8,15 @@ import (
 	"time"
 
 	"gitea.maximumdirect.net/ejr/feedkit/event"
+	"gitea.maximumdirect.net/ejr/feedkit/logging"
 	"gitea.maximumdirect.net/ejr/feedkit/sources"
 )
 
+// Logger is a printf-style logger used throughout scheduler.
+// It is an alias to the shared feedkit logging type so callers can pass
+// one function everywhere without type mismatch friction.
+type Logger = logging.Logf
+
 type Job struct {
 	Source sources.Source
 	Every  time.Duration
@@ -23,8 +29,6 @@ type Job struct {
 	Jitter time.Duration
 }
 
-type Logger func(format string, args ...any)
-
 type Scheduler struct {
 	Jobs []Job
 	Out  chan<- event.Event