## Problem

During block syncing and heavy p2p activity, the terminal gets flooded
with verbose INFO-level log messages from p2p and addrbook components,
making it difficult to see important information. Users reported log
spam like:

```
6:18PM INF new bucket is full, expiring new book=/Users/rootulp/.celestia-app/config/addrbook.json module=p2p
6:18PM INF Connection is closed @ recvRoutine (likely by the other side) conn=MConn{65.109.83.40:28656} module=p2p
6:18PM INF Saving AddrBook to file size=100
6:18PM INF Ignoring inbound connection: already have enough inbound peers address=192.168.1.1:26656
```

## Solution

Changed specific p2p and addrbook log messages from INFO to DEBUG level
to reduce log spam while preserving important error and lifecycle
information.

### Changes Made

1. **p2p/pex/addrbook.go**: `"new bucket is full, expiring new"` - INFO
→ DEBUG
2. **p2p/conn/connection.go**: `"Connection is closed @ recvRoutine
(likely by the other side)"` - INFO → DEBUG
3. **p2p/pex/file.go**: `"Saving AddrBook to file"` - INFO → DEBUG
4. **p2p/switch.go**: `"Ignoring inbound connection: already have enough
inbound peers"` - INFO → DEBUG

### Impact

- **Reduces log spam** during block syncing and peer discovery
- **Preserves important logs** - service lifecycle and error messages
remain at appropriate levels
- **Minimal change** - only 4 lines modified across 4 files
- **Consistent with previous fixes** - follows pattern established in
[#9764](tendermint/tendermint#9764)

### Testing

- All p2p tests pass
- Build successful
- Verified log level changes work correctly (messages now show
`D[timestamp]` instead of `I[timestamp]`)

Fixes #2130.

> [!WARNING]
>
> <details>
> <summary>Firewall rules blocked me from connecting to one or more
addresses</summary>
>
> #### I tried to connect to the following addresses, but was blocked by
firewall rules:
>
> - `126.101.171.250`
> - Triggering command: `/tmp/go-build3427852302/b571/pex.test
-test.testlogfile=/tmp/go-build3427852302/b571/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.short=true` (packet block)
> - `167.42.4.173`
> - Triggering command: `/tmp/go-build3367807797/b001/pex.test
-test.testlogfile=/tmp/go-build3367807797/b001/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.v=true -test.short=true`
(packet block)
> - `179.222.23.223`
> - Triggering command: `/tmp/go-build3427852302/b571/pex.test
-test.testlogfile=/tmp/go-build3427852302/b571/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.short=true` (packet block)
> - `192.0.2.1`
> - Triggering command: `/tmp/go-build3427852302/b571/pex.test
-test.testlogfile=/tmp/go-build3427852302/b571/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.short=true` (packet block)
> - Triggering command: `/tmp/go-build3367807797/b001/pex.test
-test.testlogfile=/tmp/go-build3367807797/b001/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.v=true -test.short=true`
(packet block)
> - `195.21.4.91`
> - Triggering command: `/tmp/go-build3367807797/b001/pex.test
-test.testlogfile=/tmp/go-build3367807797/b001/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.v=true -test.short=true`
(packet block)
> - `20.230.104.91`
> - Triggering command: `/tmp/go-build3367807797/b001/pex.test
-test.testlogfile=/tmp/go-build3367807797/b001/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.v=true -test.short=true`
(packet block)
> - `246.45.68.141`
> - Triggering command: `/tmp/go-build3427852302/b571/pex.test
-test.testlogfile=/tmp/go-build3427852302/b571/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.short=true` (packet block)
> - `30.72.37.142`
> - Triggering command: `/tmp/go-build3427852302/b571/pex.test
-test.testlogfile=/tmp/go-build3427852302/b571/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.short=true` (packet block)
> - `93.110.115.172`
> - Triggering command: `/tmp/go-build3367807797/b001/pex.test
-test.testlogfile=/tmp/go-build3367807797/b001/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.v=true -test.short=true`
(packet block)
> - `anotherbad.network.addr`
> - Triggering command: `/tmp/go-build3427852302/b571/pex.test
-test.testlogfile=/tmp/go-build3427852302/b571/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.short=true` (dns block)
> - `bad.network.addr`
> - Triggering command: `/tmp/go-build3427852302/b571/pex.test
-test.testlogfile=/tmp/go-build3427852302/b571/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.short=true` (dns block)
> - `ya.ru`
> - Triggering command: `/tmp/go-build3427852302/b552/p2p.test
-test.testlogfile=/tmp/go-build3427852302/b552/testlog.txt
-test.paniconexit0 -test.timeout=10m0s -test.short=true` (dns block)
>
> If you need me to access, download, or install something from one of
these locations, you can either:
>
> - Configure [Actions setup
steps](https://gh.io/copilot/actions-setup-steps) to set up my
environment, which run before the firewall is enabled
> - Add the appropriate URLs or hosts to my [firewall allow
list](https://gh.io/copilot/firewall-config)
>
> </details>



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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: evan-forbes <42654277+evan-forbes@users.noreply.github.com>