feat: real EXIF extraction via adapters-exif crate

- MetadataExtractorPort in domain (bytes → StructuredData)
- adapters-exif: NomExifExtractor using nom-exif, handles EXIF + TrackInfo
- Worker's MetadataExtractorPlugin delegates to port, no longer knows nom-exif
- Filters noisy binary tags (U8Array, Undefined, Unknown)

Cargo.lock

@@ -17,6 +17,15 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "adapters-exif"
+version = "0.1.0"
+dependencies = [
+ "bytes",
+ "domain",
+ "nom-exif",
+]
+
 [[package]]
 name = "adapters-nats"
 version = "0.1.0"
@@ -119,6 +128,15 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "approx"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "async-nats"
 version = "0.48.0"
@@ -836,6 +854,17 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "geo-types"
+version = "0.7.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94776032c45f950d30a13af6113c2ad5625316c9abfbccee4dd5a6695f8fe0f5"
+dependencies = [
+ "approx",
+ "num-traits",
+ "serde",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -1232,6 +1261,16 @@ version = "2.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d98f6fed1fde3f8c21bc40a1abb88dd75e67924f9cffc3ef95607bad8017f8e2"
 
+[[package]]
+name = "iso6709parse"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5090db9c6a716d1f4eeb729957e889e9c28156061c825cbccd44950cf0f3c66"
+dependencies = [
+ "geo-types",
+ "nom",
+]
+
 [[package]]
 name = "itertools"
 version = "0.13.0"
@@ -1385,6 +1424,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "mio"
 version = "1.1.1"
@@ -1428,6 +1473,32 @@ dependencies = [
  "signatory",
 ]
 
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
+[[package]]
+name = "nom-exif"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d759833b65510dc55d774e34b7ef6665ffd293eae44844e189a9da2bea53d47a"
+dependencies = [
+ "bytes",
+ "chrono",
+ "iso6709parse",
+ "nom",
+ "regex",
+ "serde",
+ "thiserror",
+ "tracing",
+]
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.50.3"
@@ -3563,6 +3634,7 @@ dependencies = [
 name = "worker"
 version = "0.1.0"
 dependencies = [
+ "adapters-exif",
  "adapters-nats",
  "adapters-postgres",
  "adapters-storage",