Add comprehensive logging with tracing, file rotation, and systemd integration

- Add tracing-appender and tracing-journald for production logging
- Add LoggingConfig with trace_sample_rate, json_output, journald options
- Expand init_logging() with file rotation, journald, and stderr layers
- Add sanitize_path() helper for PII protection in logs
- Instrument FUSE operations with #[instrument] and trace decision points
- Instrument gRPC handlers (10 methods) with span correlation
- Add spawn instrumentation for health monitor, indexer, watcher tasks
- Add broadcast lag handling (RecvError::Lagged) in event subscribers
- Fix webhook.rs expect() calls with proper error handling
- Add logging to patterns.rs, collections.rs, artwork.rs database ops
- Add Drop impl logging for PluginManager and WatchHandle
- Update systemd service with rate limiting and journal output
- Add logrotate config and example config.toml with logging section

musicfs/Cargo.lock

@@ -1764,7 +1764,7 @@ dependencies = [
  "serde",
  "sled",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "tracing",
 ]
@@ -1784,7 +1784,7 @@ dependencies = [
  "serde",
  "sled",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "tracing",
  "xxhash-rust",
@@ -1805,6 +1805,8 @@ dependencies = [
  "musicfs-origins",
  "tokio",
  "tracing",
+ "tracing-appender",
+ "tracing-journald",
  "tracing-subscriber",
 ]
 
@@ -1816,9 +1818,10 @@ dependencies = [
  "serde",
  "serde_json",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "toml",
+ "tracing",
  "xxhash-rust",
 ]
 
@@ -1854,6 +1857,7 @@ dependencies = [
  "serde_json",
  "sha2",
  "tempfile",
+ "thiserror 1.0.69",
  "tokio",
  "tokio-stream",
  "tonic",
@@ -1868,7 +1872,7 @@ dependencies = [
  "image",
  "musicfs-core",
  "symphonia",
- "thiserror",
+ "thiserror 1.0.69",
  "tracing",
 ]
 
@@ -1881,7 +1885,7 @@ dependencies = [
  "libc",
  "musicfs-core",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "tracing",
 ]
@@ -1897,7 +1901,7 @@ dependencies = [
  "serde",
  "serde_json",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "tracing",
  "wasmtime",
@@ -1915,7 +1919,7 @@ dependencies = [
  "serde_json",
  "tantivy",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "tracing",
 ]
@@ -1932,7 +1936,7 @@ dependencies = [
  "rmp-serde",
  "serde",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "tracing",
  "xxhash-rust",
@@ -2460,7 +2464,7 @@ checksum = "ba009ff324d1fc1b900bd1fdb31564febe58a8ccc8a6fdbb93b543d33b13ca43"
 dependencies = [
  "getrandom 0.2.17",
  "libredox",
- "thiserror",
+ "thiserror 1.0.69",
 ]
 
 [[package]]
@@ -2893,6 +2897,12 @@ version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
+[[package]]
+name = "symlink"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7973cce6668464ea31f176d85b13c7ab3bba2cb3b77a2ed26abd7801688010a"
+
 [[package]]
 name = "symphonia"
 version = "0.5.5"
@@ -3126,7 +3136,7 @@ dependencies = [
  "tantivy-stacker",
  "tantivy-tokenizer-api",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "time",
  "uuid",
  "winapi",
@@ -3247,7 +3257,16 @@ version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 1.0.69",
+]
+
+[[package]]
+name = "thiserror"
+version = "2.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4"
+dependencies = [
+ "thiserror-impl 2.0.18",
 ]
 
 [[package]]
@@ -3261,6 +3280,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thiserror-impl"
+version = "2.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.1.9"
@@ -3507,6 +3537,19 @@ dependencies = [
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-appender"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "050686193eb999b4bb3bc2acfa891a13da00f79734704c4b8b4ef1a10b368a3c"
+dependencies = [
+ "crossbeam-channel",
+ "symlink",
+ "thiserror 2.0.18",
+ "time",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "tracing-attributes"
 version = "0.1.31"
@@ -3528,6 +3571,17 @@ dependencies = [
  "valuable",
 ]
 
+[[package]]
+name = "tracing-journald"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d3a81ed245bfb62592b1e2bc153e77656d94ee6a0497683a65a12ccaf2438d0"
+dependencies = [
+ "libc",
+ "tracing-core",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "tracing-log"
 version = "0.2.0"
@@ -3539,6 +3593,16 @@ dependencies = [
  "tracing-core",
 ]
 
+[[package]]
+name = "tracing-serde"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "704b1aeb7be0d0a84fc9828cae51dab5970fee5088f83d1dd7ee6f6246fc6ff1"
+dependencies = [
+ "serde",
+ "tracing-core",
+]
+
 [[package]]
 name = "tracing-subscriber"
 version = "0.3.23"
@@ -3549,12 +3613,15 @@ dependencies = [
  "nu-ansi-term",
  "once_cell",
  "regex-automata",
+ "serde",
+ "serde_json",
  "sharded-slab",
  "smallvec",
  "thread_local",
  "tracing",
  "tracing-core",
  "tracing-log",
+ "tracing-serde",
 ]
 
 [[package]]
@@ -3944,7 +4011,7 @@ dependencies = [
  "log",
  "object 0.32.2",
  "target-lexicon",
- "thiserror",
+ "thiserror 1.0.69",
  "wasmparser 0.201.0",
  "wasmtime-cranelift-shared",
  "wasmtime-environ",
@@ -3985,7 +4052,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "target-lexicon",
- "thiserror",
+ "thiserror 1.0.69",
  "wasm-encoder 0.201.0",
  "wasmparser 0.201.0",
  "wasmprinter",
@@ -4076,7 +4143,7 @@ dependencies = [
  "cranelift-entity",
  "serde",
  "serde_derive",
- "thiserror",
+ "thiserror 1.0.69",
  "wasmparser 0.201.0",
 ]