fix: sync .env.example with actual config in src/config.rs

Removed outdated options that don't exist in code:
- NGIT_SYNC_STARTUP_DELAY_SECS
- NGIT_SYNC_RECONNECT_DELAY_SECS
- NGIT_SYNC_RECONNECT_LOOKBACK_DAYS
- NGIT_SYNC_STARTUP_JITTER_MS
- NGIT_ARCHIVE_MODE (future/planned)

Added missing options that exist in code:
- NGIT_SYNC_DISCONNECT_CHECK_INTERVAL_SECS
- NGIT_SYNC_BASE_BACKOFF_SECS
- NGIT_SYNC_DISABLE_NEGENTROPY
- NGIT_REJECTED_HOT_CACHE_DURATION_SECS
- NGIT_REJECTED_COLD_INDEX_EXPIRY_SECS
- NGIT_NAUGHTY_LIST_EXPIRATION_HOURS

All environment variables now match exactly between src/config.rs
and .env.example, with consistent defaults and descriptions.

1 files changed, 45 insertions, 27 deletions

diff --git a/.env.example b/.env.example
index 95db3c2..6a93d78 100644
--- a/.env.example
+++ b/.env.example
@@ -121,30 +121,48 @@
 # Default: 3600 (1 hour)
 # NGIT_SYNC_MAX_BACKOFF_SECS=3600
 
-# Delay in seconds before running startup catchup
-# CLI: --sync-startup-delay-secs <seconds>
-# Default: 30
-# NGIT_SYNC_STARTUP_DELAY_SECS=30
-
-# Delay in seconds before running reconnect catchup
-# CLI: --sync-reconnect-delay-secs <seconds>
-# Default: 10
-# NGIT_SYNC_RECONNECT_DELAY_SECS=10
-
-# Number of days to look back for reconnect catchup
-# CLI: --sync-reconnect-lookback-days <days>
-# Default: 3
-# NGIT_SYNC_RECONNECT_LOOKBACK_DAYS=3
-
-# Maximum startup jitter in milliseconds for sync connections
-# Set to 0 to disable jitter (useful for testing)
-# CLI: --sync-startup-jitter-ms <ms>
-# Default: 10000 (10 seconds)
-# NGIT_SYNC_STARTUP_JITTER_MS=10000
-
-# ============================================================================
-# FUTURE/PLANNED OPTIONS (not yet implemented)
-# ============================================================================
-
-# Archive mode (GRASP-05)
-# NGIT_ARCHIVE_MODE=false
\ No newline at end of file
+# Interval in seconds for checking disconnected relays and attempting reconnection
+# Set to lower value for faster reconnection testing
+# CLI: --sync-disconnect-check-interval-secs <seconds>
+# Default: 60
+# NGIT_SYNC_DISCONNECT_CHECK_INTERVAL_SECS=60
+
+# Base backoff time in seconds for relay reconnection
+# Used for exponential backoff: base * 2^(failures-1)
+# Set to 1 for faster test cycles
+# Note: The connection timeout is capped at this value
+# CLI: --sync-base-backoff-secs <seconds>
+# Default: 5
+# NGIT_SYNC_BASE_BACKOFF_SECS=5
+
+# Disable NIP-77 negentropy sync (use REQ+EOSE instead)
+# When enabled, sync will use REQ+EOSE instead of negentropy for history sync
+# Primarily useful for testing that sync works without negentropy support
+# CLI: --sync-disable-negentropy
+# Default: false
+# NGIT_SYNC_DISABLE_NEGENTROPY=false
+
+# ============================================================================
+# REJECTED EVENTS INDEX
+# ============================================================================
+
+# Hot cache duration in seconds for rejected announcements
+# Stores full event objects for immediate re-processing when dependencies resolve
+# Too short (<30s): Miss events from slow relays
+# Too long (>5min): Waste memory
+# CLI: --rejected-hot-cache-duration-secs <seconds>
+# Default: 120 (2 minutes)
+# NGIT_REJECTED_HOT_CACHE_DURATION_SECS=120
+
+# Cold index expiry in seconds for rejected announcements
+# Stores metadata only to prevent repeated downloads of rejected events
+# CLI: --rejected-cold-index-expiry-secs <seconds>
+# Default: 604800 (7 days)
+# NGIT_REJECTED_COLD_INDEX_EXPIRY_SECS=604800
+
+# Hours before removing relay from naughty list
+# Relays with persistent infrastructure issues (DNS, TLS, protocol errors) are
+# tracked separately and retried after this expiration period
+# CLI: --naughty-list-expiration-hours <hours>
+# Default: 12
+# NGIT_NAUGHTY_LIST_EXPIRATION_HOURS=12
\ No newline at end of file